I just made my own for my 9" with scrap metal and work and turned it down on a lathe. I believe I used 1 3/4" shaft and huge aluminum shaft and turned it down. I had to remove an extra 2.5" from one side of my housing because it came from a 76 bronco and the housing was offset. I was able to use the rear disc brakes from an Exploder with some small modifications to the backing plates. The brake line actually bolted up to the darts line with no issues and will be able to tie it into the darts parking brake. The rear is now in the car and now I am on to other things before the spring.