Great Britain boss Brian Noble has been given the green light to pick Henry Paul for the 2006 Tri-Nations series.
Paul won 24 caps for New Zealand before switching codes
Paul made 24 appearances for New Zealand before his high-profile switch to rugby union in July 2001.
But the 32-year-old qualifies for the Lions because he has an English grandparent and also because he played for the England rugby union side.
"I will look at anyone if they can add something to the squad and they are interested," Noble told BBC Sport.
Paul, who was born in Tokoroa, joined Premiership side Gloucester in 2001, helping them win the Powergen Cup.
He was also capped six times by England over a four-year period.
He eventually made a shock return to league last week when he signed a two-and-a-half year deal with Super League side Harlequins.
He did not have to wait long for his debut, coming off the bench in Saturday's 22-16 win over Huddersfield.
Noble, who coached Paul when the two of them were at Bradford Bulls, has no doubt his former charge is still good enough to play international rugby.
"He has been playing league since he was three years old," said the current Wigan coach. "It is like riding a bike.
"It's a question of how quickly he gets back up to speed. He's quite a fit bloke."
Should Paul, who has a Liverpudlian grandfather, make it into Noble's squad, he would not be the first player to switch allegiances.
Former Leeds Rhinos centre Tonie Carroll played for New Zealand at the 2000 World Cup but went on to represent Australia in 2004.
If Paul does win a Lions call-up, he could come up against his younger brother, Robbie, who was a member of the New Zealand squad that won last year's Tri-Nations competition.
Meanwhile, St Helens coach Daniel Anderson is tipping Saints prop James Graham to win his first GB cap against New Zealand next month.
The 6ft 2in Graham made his Super League debut while still only 17 in August 2003.
He has made rapid progress since captaining the England Academy on their successful tour to Australia two years ago and has appeared in 10 of Saints' 12 League games so far this year.
Anderson said: "He's in wonderful form. Name me four in-form props who play in the Super League and I'd be very surprised if he's not one of them."