any one using a new rear end

So the 8-3/4 small bolt is getting harder and more expensive to use and or find one. yes you can make one. Is any one got a fix using a later model rear end from a newer mopar possibly with rear discs. Would this be a waste if you can just cut down a B body rear and buy new axles ?
i don't quite understand what you're asking? is the question what's modern and fits or can you figure out discs for a 8.75?

nothing modern is a full on bolt in. there's tons of options, but everything requires some level of fab work or scurrying around collecting parts to make discs happen, or both.

if you already have a 8.75, the easy button is new axles and a disc kit.