Did they make 5x4” axles for 8 3/4 rear ends?

I'd suggest getting involved with the CPW club if you are in the LA area. I KNOW members of that squad are very knowledgeable and some are even on the FABO list. The local Mopar clubs are great at putting you in touch with local resources. Lived in LA years ago...now east coast...
I read a post in this thread towards the end and there's a guy in CA. says he has a set of 5X4 he'll give away.