The factory Mopar units are actually real Denso starters and the aftermarket stuff is mostly Chinese rip offs
What does your Powermaster do? Does it just click or is there no response at all when voltage is applied. If it just clicks you can just get a set of contacts for less than $20.00 and it will be like new again. I put contacts in probably over 100 starters in my career and that fixes 99.9% of them.

Gus