Looking for .577 Snyder, .57 Snyder

I am looking to purchase, or trade for, (1) .577 Snyder, and (1) .57 Snyder, but only the drawn brass cartridge, not the early paper case.
It is a plus if they are made by Dominion/C-I-L, (and I would love to have a box with the cartridges, but might not be able to afford them…).