Yes, I'm an idiot. While rushing to change a snare head in poor lighting while using my 51 year old bifocal-needing eyes, I buggered up the threads on one of the inserts that the snare drum head bolts screw into. The drum is a yamaha stage custom snare. Where can I buy some of these inserts, and some more bolts? I probably need to get plenty of spares, as my eyes aren't going to get any better. Thanks!