Look out! It's a newbie with carbine problems!

[JimF4M1s (Deceased)]

First I would get a book that would inform me of the proper name of the parts you have in question. IE barrel clamp=barrel band.

For $20 give or take, you can but U.S. M1 Carbines, Wartime Production by Craig Riesch. It will show all the parts of a GI carbine with names and discriptions. If you are looking for something on an aftermarket gun I don't know what too say except look at book tables at a show. I think Auto Ordanance is the only current maker.