Pinsider Colsond3 was making custom key fobs for a time. I'm not sure if he's still making them, but it can't hurt to reach out. Here's the old ad of the product he was selling. Also, he's a super stand up guy, so don't hesitate to do business with him.
https://pinside.com/pinball/forum/topic/coin-door-keychains-with-original-artwork