can i get a rear end from.....

All due respect, Sister, but why bother ? A-body 8 1/4 or EVEN 8 3/4, are NOT that hard to find. 8 3/4 cost a few bucks, but an 8 1/4 is almost FREE for an A-body. Out here they have very little value. Like maybe $200 for a complete bolt in 8 1/4 set up. Dakota ?, Jeep ? Talk about taking something SIMPLE, and making it DIFFICULT. What is wrong with the diff in your Duster right now ?