Frank, I don't consider a mismatched firing pin as a mismatched gun... in the purest sense, sure, but grips and firing pins don't bother me as much as say sideplates and take down levers.
Shoot me a email at
weimar_lugers@verizon.net and I'll check my firing pins, I think I have about 15, maybe you'll get lucky. Your firing pin and $20 and its on your way to your house (a 1 out of 100 chance, right?

)
Or, I'll be glad to buy it from you at a shooter price
Ed