Mike, If you used to be a watchmaker, do you still have ( or access to) a watchmaker's lathe? If so, you can make those missing screws on the lathe, but be sure to take a couple of the remaining screws out of the gun and measure the thread pitch, as S&W used it's own proprietary thread pitch ( or you can re-tap the screw holes to a new thread pitch and make new screws to your own pitch choice). Good luck. Ed.