Yup. Best bet is the Wagoneer drums and find a reasonable machine shop to enlarge the center hole and drill the lug holes larger.
My guy charged me $40 a piece. Since the Wagoneer drums are cheap, the total price is still good.
Btw, all the other parts are available for these rears including new trac-lok (posi) carriers. My rear originally had 3.54 gears and an open diff. Both the gears and spiders were shot. A new trac-loc was hardly any more $ than replacement spiders.
Too bad the original gears were bad. I like the ratio and replaced them with new Dana 3.54 gears. So everything was replaced except for the axles and yoke. They were good.