i believe the 11 x 2 1/2" rear brake assemblies are the same for dana's, 9 1/4 rears, and 8 3/4's.
they can be found on chryslers, and 2 wheel drive pickups and vans.
those things used to be super plentiful in the junkyards, but they seem to be few and far between these days.
back when, you could grab the whole assembly, and most of the time, you could just bolt it on and go because the front end does most of the braking.
at most, you may have had to knock off the rust ridge on the drums, or rebuild the wheel cylinders because the rubber cups got hard and stuck.
today, if a guy was lucky enough to come across this stuff in a yard, you would probably be only able to save the backing plate, the emergency brake equalizing arm and strut, and possibly the drum if it wasn't too rusty or cut oversize.
luckily, everything internal is available new. [i think]