Finding match for old Congoleum vinyl tile

Anyone have tips on finding a match for ~30+ year old, 1/16" Congoleum vinyl tiles? I need to replace a few but can’t find them anywhere. Even a local Congoleum dealer said I won’t find any. I have a couple of unused tiles, and even have the original box they came in, but I’d like some more. I can post a picture if that would help.

I’m pretty sure they are VAT (Vinyl Asbestos Tile) and are probably over 30 years old. I’d rather not replace 100s of tiles with a new set when only a few need replacing. The only option I can think of is trying to match the pattern with a stick-back 1/16" vinyl tile.