1966 RFI 2A1 parts?

I understand getting gun parts across the border has become a nightmare, if not impossible. I’ve checked the usual sources (liberty tree, Sarco etc etc etc) for good parts and advice. Is there an ultimate authority that I can visit with and get parts from? One that knows the 2A1’s everywhere, I look they get skipped over. Everything else is on their list.
When I’m done with this resto, I’ll also have quite a few parts (I think they’re for No1 MkIII, to get rid of.
Stock set has a brass butt plate and nose cap with an “x” serial number????

I've got some 2A1 parts; nose caps, other stock metal bits and pieces. Let me know what you're looking for.

Looking for the 2A1 guru!