ORIGINAL: Waltbs

I have a browning Sweet 16 that was handed down to me several years ago and I want to find some information on it. There is no clear serial number that I can tell, but its got to be from the early 1900's. It looks like it needs the butplate replaced and a new springtube, along wih a missing screw. Any idea where I could get these parts in a vintage condition, not new and shiney but original perhaps. This may be a shot in the dark but I shought I would ask.