I don’t own this trick, but if it’s helpful, here are a few suppliers who claim to print directly onto bicycle stock:
https://www.houseofchuckles.com/
https://printbymagic.com/printing/printing-for-magicians/custom-printed-cards/
https://www.printonmagic.com/product/custom-printed-cards-face-blue-back-bicycle-full-deck-52-cards/