Ford 9" set up for a 73+ ABody

Moser Engineering can whip you up a nice housing very reasonably.

Moser Engineering - Part # 7H9FLS - Moser 9" Leaf Spring floater (housing only) - Housings

All you need to do is tell them your measurements and what ends you want on it. They can even build you the whole thing, or anywhere in between. Seems like a lot less trouble than taking a chance on something used that will have nothing in the way of warranty and still be used.