I'm batting .000 on getting folks to send me stuff that's verifiably over 50 years old on my C&R, if it's in any way shape or form, "not C&R stuff" in their minds. And when mine expired, there was nothing left but the Mosin's, I didn't need five more, so I let it run out.
Seems to me that if it isn't WWI/WWII surplus, or something the big mail/internet order places are all selling as C&R, non-licensees and many/most 01's just... won't... do... it...
Might be useful to give folks the warm fuzzies if you come across something cool at a yard or estate sale, to have some sort of "official license", but that's a total shot in the dark.
I'm now more about trying to collect whatever neat stuff is the next "HS2000", i.e. the XD, before it was the XD, and SA put their stamp on it, and raised the price by $2-300. Or stuff like my measly $299 Draco AK pistol, which is now $800 unobtanium. Or things like the Wiselite semi-auto Sterling re-weld, that I knew would dry up once the Sterling parts kits were exhausted.