I have some details on the Volvo 940 axle that I am using here: viewtopic.php?f=35&t=4121
Two weeks ago, I finally bought an axle:
It's from a 1993 Volvo 940.
59" (approximate) from WMS to WMS
5x108 bolt pattern
integrated drum emergency brake
Solid rear disc brakes, with (very small) dual piston calipers.
Input is offset just a hair under an inch to the passenger side.
Weight: All up, 175lbs including brakes, fluid, everything. Calipers weigh in around 37 lbs (so axle without disc brakes (but including drum components) and fluid is about 137lbs)
It's a Posi (a locker actually that only locks up to 25mph, but there is a way to make it engage at faster speeds), 4.10 gears. Apparently it's very closely related to a Dana 30 axle, so other LSD units are pretty readily available.
Cost: $200 from a junkyard.