Mid 90s Ford Ranger rear spring hangers should fit, that's what I've been running for a while now. Replacement brackets are built to be riveted or bolted to the frame, but you could easily weld them on. They are a much better design than the boxes on our rigs, and will not clog up and rust out like ours.
Something like this should work:
I found some other ones that were a better and stronger design, but I can't find the link right now. If I come across it, I'll post it up.
You don't need to spend much, though. Any mid-90s Ranger rear spring hangers should work.