833 belhousing adapter ring

You know me, Mr. Backyard method. Why couldn't you machine/ rough machine a bushing ring, BRAZE / silver braze it to your retainer, and then do a clean up cut on the late to get it properly round and concentric to the retainer? In fact for guys with limited machine tools, might be easier. Cut a hole in a plate, braze the retainer in, then rough cut the plate and turn it down from there.