I did a quick search yesterday and did not see any listed on ebay, other then the dura brake rotor only. I did not find ram man rotor either. His website has changed and not all sections have stuff in it. I will look a little harder.

I just imagine disc brakes for early b bodies being a new thing to mopar did not have sufficient productions numbers to justify the variety of reproduced rotors that A bodies and Later B&E did. Especially as disc became more popular.

I actually have a set of single piece KH rotors made for the 70-72 B as over the counter replacements. But Bendix rotor and calipers seem much harder to come by at swap meets and such. I did score a useable pair for my 69 as backups, and purchased the dura brake set of rotor.

For the original poster it would be pretty easy and inexpensive to get all the correct 70-72 stuff on the car since he has the 70-72 spindle most likely.