8 1/4 Differential desperately wanted

Thats just the thing, I like to gas it, floor it etc, which I know will break it when I get done with a build. At 28 i've been stuck in the slow 4 cyl FWD car age and finally got something I can attempt to put some horsepower into. Post after post shows there is no good from a 7 1/4, and these things can grenade themselves with the slightest abuse.
If im having and issue finding one now, I would prefer not to do my build, blow it up and have my ride sitting for a while waiting to source out a rear end. Engine and transmission parts are plentiful but it seems rears are becoming hard to find.

Junkyards in CA are a ripoff since they have to pull the parts off for safety reasons so they charge 3x what the part is actually worth.

I didn't think a rear would be so hard to find otherwise I would of keep this in mind when searching for my project car. Ive been searching like crazy everywhere.