Looking for 8.25 or 8.75

I am looking for a 8.25 or 8.75 rear end for my 1973 Duster.I needs to fit in my Duster and at least a simi street freindly gear open or suregrip.I have cash or trade I have many 70/71/73 and some 73 Duster parts.Need to pick it up around north Georgia of neighboring states.