Phoned around all morning until I found an open transmission shop that had some spares sitting around. Unfortunately that did not fix my problem fully. My reverse drum is loosing pressure when I air test it. I was able to insert a piece of hydraulic hose and seal the piston, and Air it up from the check valve on the other side. I also tried checking that valve wasn't leaking, and it seams okay as well.. just a little confused as to where it is leaking from....