Im sorry to break it to you, but the EFIJY is simply a concept car, it was never intended to go into production and according to GMH, never will. It was a toy designed and built by the boys in the Holden plant to mark the birthday of the FJ holden hence it's classic styling. The car itself has taken the world by storm it even appeared at the Detriot Motor Show where, rumor has it, an unnamed male US Hip Hop artist offered a fairly large sum just to have it appear in one of his video clips.
If you want to see more of the EFIJY and holdens other concept cars, follow this link.  
http://www.holden.com.au/www-holden/action/conceptcar?modelid=20005As for the Models, there was a company here in Australia that used to do limited runs (5000 world wide) of a number of models both holden and ford, these were  very detailed curbside models however the companies name has slipped my memory however the kit's do surface from time to time on ebay. 
More recently however, there has been a lot of resin transkits surfacing from another Aussie, these kits normally just contain the body and interior which you then need to put onto a donor chassis, the range he's been doing include the latest Monaro (what we call the Pontiac GTO before we export them to the US) as well as the eariler versions ('70's era) a few Utes, Panelvans and one or two later performance versions. look for them undr Resin, in the Automotive section of toys & hobbies