Junkyard swaps: Rear brake options for 8 1/4 and 8 3/4 axles.

I actually have 4 B body 8 3/4" axles and an A body 8 1/4" that I got with no brakes on them. In short, I need to put brakes on 5 axles.
I have six 10" backing plates, six 10" drums and a bunch of shoes. Enough to do at least 3 axles if I can find all the guts. I do have a box of springs, adjusters and other misc hardware. It is the levers, cables and wheel cylinders that I don't have. Wheel cylinders and springs can be found locally but the parking brake parts and those horizontally positioned 1/4" thick steel bars are not that easy to find. That is why I was hoping to find some complete assemblies. I've messed with these cars for years but it can be confusing to me to look at a pile of drum brake parts and know if I have the right stuff. I used to do rear brake jobs one side at a time so I'd have the other side to look at to get it right.
I have a couple of drum brake cars out back that I can look at to see what parts that I need. I have found though that there were some changes over the years. For years, I was fortunate to have an easy time finding what I needed at the junkyards. I knew that this day would come but it still sucks to see the old stuff get so hard to find.