I have a P938 Nightmare that I am making custom grips for. I'm trying to get a couple extra sets of grip screws, but I don't know which ones are compatible. The only rock solid info I have found is that the 938 and 238 have the same ones. I'd like to find some just a tad longer, and some stainless ones like the Turbo design. Anyone know the which models cross over and where I can find them?