This is a quick model I whipped up, and I think that some people would appreciate this. The cards do whistle nicely. There are 2 versions one is thicker which could be good if you want the card to be more durable and it's about the thickness of a credit card, the second one is thinner which is better suited for slicing and is more similar to the real thing, it's about the thickness of a regular playing card.

WARNING: wait for the build plate to completely cool or else the card will warp, take it off careful to avoid warping, a scraper is recommended.

It's been a while since I've posted anything and I've learned a lot about 3d design, I hope you will enjoy this.