OK, one last thought for you: repairing a differential carrier assembly isn't hard, or require tools you won't likely have, unless you want to use a dial indicator. There is a way around that-I used to manage an automotive assembly line that built heavy duty off-highway drive-steer axles. We...
OK, that makes more sense.
First, If you're going to buy a used, complete differential carrier assembly (that heavy thing between the propeller shaft and the axle housing that someone here is going to call a third member), you should be fine.
Just have someone check the seals, bearings and...
It's hard to believe your differential failed catastrophically and your ring and pinion are fine. Those gears are too close together and bathed in the same oil, at the same time. Do you know what exactly is bad?
Also, what do you mean by housing? Are you referring to the carrier casting, or...