Don't think its just simple matter of finding another set and slapping them on there and calling it good.
Bearing caps for carriers are kind of like main caps on an engine block with the crank shaft. They are machined for each other, a specific pair, and tossing a different set of caps onto the block, or differential housing, may or may not mess things up. It may or may not throw everything out of whack.
Not saying your D60 housing is junk now but if you do score a pair of caps, it would be wise to machine them to make them true and perfectly round so nothing is out of circumference and damage the bearings or worse yet the carrier and ring and pinion.