I think I just found a rear axle...though some assembly is required...
There is a guy who stopped building his project xj, he has an xj d44 rear for sale. However its disassembled and blasted. I really could care less that its a 44, but the housing is cleaned and ready to go. it also has the spacer plates to adapt to disc brakes. he also has a nib arb locker, compressor, gear set, install kit, chromo shafts, and an iro truss. basically he is charging for the price of the locker and compressor. the only issue is the gear set is 4.88(i think thats a 44 ratio) and not 4.10...however, i'm sure it wouldn't be terrible to trade for a 4.10 set since the gears are nib motive gears...
more than i want to spend on an upgrade, but its a heck of a deal. i would just need to buy brake parts and lines. i think the adapter uses explorer calipers and rotors...of which i may actually already have in the shop. it also may be a little overkill for what i was planning on doing, but it would be an easy axle to sell if i ever upgraded....