Well, I'm sort of working on this presently...
I started out here:
http://www.car-part.comThe best looking deal is this one in Mississippi. Shipping would suck, the axle's $650, but it's got 153,000mi on it. I think they could freight it to a depot station where it could be picked up, but I'm not sure yet.
Here's the yard that has it:
Dixie Auto Parts, Inc. USA-MS(Columbus) E-mail 1-800-720-5355
I'm going to give a few yards a call that didn't list a price, to see what the general concensus is before I commit to buying one. At this point, I wouldn't pay more than $900 for what I'm looking for.
Let me know if you find any good sources.