I am looking for an M1 carbine, original scope mount. This carbine has the four screw holes drilled and tapped in the left side of the receiver, presently the rifle has a plastic filler piece between the receiver and the stock. I have tried eBay, Gun's International and Numrich; however...have struck out with all of them. Hope someone can give me another source for the scope base, and rings if I can find them. Thanks for all replies.