Greg and I have a bunch of low KM Japan import 4.11 complete thirds available. All ex HJ61/BJ74s $400 each.
Factory 4.56 thirds will be tough to scare up.
Kevin:
i have a set of very complete F&R diffs out of a 1983 BJ 60 c/w springs, that were still in daily use very recently.....not sure if there 4.11, but i also have a set of F&R thirds out of a BJ 42 that are 4.11.....this, will probably give you the package you are looking for.......no 4.56s at all
all what you need will be $850.00, you come and remove it, as these parts are still part of a complete vehicle....