A-body SBP 8 3/4 brake backing plates

I’m slowly getting my 8 3/4 housing put together and I’m on the hunt for backing plates. I’m planing on keeping it small bolt pattern for the time being since I already have the small bolt axles. So I’m looking for whatever would have came on a 68 Dart 8 3/4.

The more complete the better but some bare ones would work. Hell, if someone has a full complete drum setup for one these, that would be awesome.