Thanks, JD.
I just picked up a low mileage used Warthog from somewhere around 2004, and getting it running well.
The spare/proprietary parts for these things seems to be Sarco and Numrich, and these are sparce. I found the mag catch and trigger shoe/bar, as the primary frame specific parts. I have not checked too many other parts for uniqueness.
EGW sells an oversize extractor to replace the Para Power Extractor, which I am not fond of. EGW also sells a 3" 1911 recoil assembly that fits a lot of different models, and fits the Warthog perfectly. You can then use ISMI off the shelf springs.
I had a P10 way back in the day, and it's funny I have come back to it. Once I wring things out, it will definitely be carried. It's a crazy little beast, and super simple to belt or AIWB.
Craig