It should be easy to make. Mine look to be 1/4" thick flat steel using Camero calipers & rotors. Once the rotors are in place, set the caliper where you think they should go, and using heavy cardboard, start cutting them to fit. Mine also use spacers coming off the four spindle bolts to level off all four mounting points.

The axle I have is 41-54, so it uses special bearings for the inside rotor plus a spacer. The outer bearing is OEM Camero. I believe the seal is different to, I can't remember for sure.

Since this is a brake job and a very important part, you are on your own in making them. I am sure most of them are CAD designed with some load bearing criteria.

Joe

Joe