I don't think anyone in here has done this. Btw, there was no 05 FJC, 06 was the first year. You should go to the fjcruiser forum and see if someone has added an e-locker to an FJC that did not have one from the factory. Then all you have to do is duplicate that. The engine, tranny and diffs are all the same. The diffs are all the same from 06-11..you don't want a smokin deal on an 06 FJC diff because that was the first year and they were blowing up.
Also, some friendly advice.... you might want to do some searches in that forum before you just post up in general discussions with your question.
Doing your own search will work, otherwise one of them in there will have to do it for you and thus you might get flamed.. Just sayin..