I've perused the old threads and the standard sources and it seems that rear leaf spring bushing replacements are a rarity.
I started searching for replacements based upon what I measured mine to be and I think I might have found one, but want to get some of your eyes on it.
https://www.offroaddesign.com/catalo.../category/631/
I think the 1-3/4" minor diameter version of these could work, I may have to shave 1/8" off of one of the inner ends of one of them but that seems doable.
If y'all think that I might be onto something, I'll order some and see if they work and report back.