Ray, I purchased an aftermarket stainless steel firing pin for my Erma Luger KGP-68A from a seller on Ebay called Iron Sight Precision (ironsightprescision.comm) about nine years ago. I just searched for their website and I did not find them but rather got routed to firingpins.com. That company doesn't list any firing pins for our Ermas, but you may wish to contact them since they may have acquired ISP's inventory.
Lastly I also picked up a spare firing pin from Ithacaartist (Dave) around the same time. He was most helpful.
When I acquire a vintage firearm I immediately search for some spare parts. Best wishes on your search.
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“God created war so that Americans would learn geography.”
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