I have my first gun that I want to pass to my son. (7 YO) There is a piece that is broken on it . It is a hard plastic piece that is screwed into the forearm and is at the fulcrum or pivoting point when the gun is "broken over". It is flat on the forearm side and U-shaped on the other with 2-screws. Where is a good place to order a replacement. I ordered 2 (just in case years ago-maybe 5-6 years) and never got the piece. They went out of Buis. but sent my money back.....got lucky there.