i don't remember the exact numbers, but your rear axle is somewhere in the ballpark of 59" wms to wms. waggy D44 is around 61.5" wms to wms which is about as perfect as you can get since you generally want a front axle a hair wider than rear for tracking. shortening an axle is not that bad if you can source or willing to pay for shorter shafts. i ended up rotating the knuckles on mine for better steering angles, it wouldn't have been too much trouble to hack off some of the width. i think a toyota mini-truck axle is another good swap but a little narrow if I recall and the gear ratio's don't match up as nice. the older cherokee D44's also work, but they aren't as plentiful if I recall and many of them were in the 80's and those driver's side drop. if you wanna go totally custom, you could consider building a hybrid... something like a ford 9" or even turn a isuzu 12-bolt into a steering axle could be an interesting project for kicks.

-Rob