Metafizzypop
Isn't that what Printer's Studio (http://www.printerstudio.com/unique-ideas/blank-playing-cards.html) and Game Crafters (https://www.thegamecrafter.com/) do?
I was going to suggest GameCrafters but I see somebody already did that. I always thought they were a POD company too, for tarot cards, playing cards, a lot of games, etc.