There is an Australian Fijian rugby league website. The list of players eligible is impressive, though they have missed out on Lote Tuqiri, who captained Fiji from full back in the 2000 World Cup, and Tariq Sims.
Akuila Uate (Newcastle), Kevin Naiqama (Newcastle), Darrell Millard (Catalans), Marika Koroibete (Wests Tigers),
Jarryd Hayne (Parramatta)
Ryan Millard (Wests Magpies?)
John Sutton (South Sydney)
Wes Naiqama (Penrith), Tariq Sims (Nth Queensland)
Petero Civinoceva (Redcliffe Dolphins), [ ] , Ashton Sims (Nth Queensland)[/i
Apart from scrum half and hooker, the team would be all top class NRL players. Many of them are Fijian born.
You could fill in the remaining 5 positions with Fijian resident rugby league players.
Such a team would probably make the 4th spot in the semifinals, as it did in 2008. It would have the fastest set of backs in the World Cup, bar none.
It would be a team that would really challenge England. The key component needed would need to be a top class coach like Wayne Bennett.