Wales coach Gareth Jenkins has also called up hooking pair Gareth Williams, and Matthew Rees.
Nigel Davies was assistant Wales coach to Gareth Jenkins from 2006 to 2007.
Wales coach Gareth Jenkins has left 16 senior players behind in Wales for a summer conditioning camp.
Gareth Jenkins believed that fatigue was a factor as the tourists crumbled in the second half in Brisbane.
"We are delighted to have linked with UWIC RFC, " said Scarlets head of regional development and recruitment Gareth Jenkins.
Best also admitted to feeling slightly sorry for the recently sacked Gareth Jenkins.
All three men are now in pole position to make their positions permanent in new coach Gareth Jenkins' backroom staff.
Wales coach Gareth Jenkins has opted to leave 16 senior players at home for the two Tests in Sydney and Brisbane.
But Wales coach Gareth Jenkins has seen enough on the trip to convince him who are the winners in his squad.
The panel of Roger Lewis, David Pickering and Gerald Davies are currently in New Zealand looking to replace sacked coach Gareth Jenkins.
On the bench, Alun Wyn Jones covers both lock and back-row, as Wales coach Gareth Jenkins has gone with three front-row replacements.
But it was Ospreys full-back Byrne, who suffered the axe from previous coach Gareth Jenkins' World Cup squad, who won the man-of-the-match award.
"It's great to have the Wales boys back and we're still right in contention in the Celtic League, " said Scarlets director of rugby Gareth Jenkins.
Gallacher told the BBC that ex-Wales coach Gareth Jenkins could return to the region, but not in a capacity that has any influence over coaching.
Davies believes that a place needs to be found within Welsh rugby for Nigel Davies and the rest of former coach Gareth Jenkins' back-room staff.
Davies was assistant Wales coach to Gareth Jenkins from 2006 to 2007, having also been his number two when Jenkins was in charge at Stradey Park.
Thomas has been picked to retake the captain's armband on the Wales tour, with coach Gareth Jenkins leaving behind 16 senior players including current skipper Stephen Jones.
Coach Gareth Jenkins has come under fire in Australia for bringing such an under-strength squad, but he insisted the players are good enough to the trouble their hosts.
But Gatland's predecessor Gareth Jenkins was sacked in the immediate aftermath of Wales' 2007 Rugby World Cup pool exit following their shock 38-34 defeat to Fiji in Nantes.
BBC: Warren Gatland concedes Wales Rugby World Cup sack fear
"We can see little strategic rationale for BT in this acquisition other than buying growth, " said Deutsche Bank analysts Gareth Jenkins and Tim Mackay in a research note.
Wales head coach Gareth Jenkins had sympathy for Henson, but said he could not afford to select unfit or out of form players in his final 30-man squad.
Fiji's victory over Wales in Nantes 14 months ago ended Gareth Jenkins' reign as coach, with Warren Gatland then taking over and guiding them to a Six Nations title.
The 27-year-old puts his dramatic improvement down to hard work under Ospreys head coach Jones and assistant Holley after former coach Gareth Jenkins left him out of Wales' World Cup squad.
White has also held preliminary talks with Wales about their vacant head coach's job after the departure of Gareth Jenkins, while Australia are looking for a new coach to replace John Connelly.
Sowden-Taylor is one of the rising stars at the Arms Park, he has won three caps and he would have been a contender for new Wales coach Gareth Jenkins' autumn Test squad.
BBC: Sowden-Taylor grimaces as his ankle is caught beneath him
He was a regular at 12 outside Jones in former Wales coach Gareth Jenkins' ill-fated reign, but the combination rarely clicked and was abandoned after the disastrous World Cup campaign, the now-injured Gavin Henson stepping in.
The Kiwi signed a four-year deal with the Welsh Rugby Union when he replaced the sacked Gareth Jenkins in December 2007 after a dismal display in the 2007 Rugby World Cup when Wales were eliminated in the group stages.
That would leave Kevin Morgan on the bench, while Hook may also have to bide his time if head coach Gareth Jenkins opts to go with Jones at fly-half and stick with Sonny Parker - a try scorer against Canada - at inside centre.
BBC: SPORT | Rugby Union | Welsh | Wales backing Hook to bounce back
Wales have been without a coach since sacking Gareth Jenkins the day after they were knocked out of the World Cup by Fiji at the end of September, although caretaker Nigel Davies will take charge of the team for the 24 November Test with South Africa in Cardiff.
Jenkins said the introduction of Gareth Thomas and Stephen Jones early in the second half helped change the game.
应用推荐