This is an original model I initially tried to sell on Etsy, but nothing ever came of it. I'll upload it here and maybe on Thingiverse. You can remix, 3D print, or do whatever you want with the model as long as you give me credit for it.

It holds standard sized cards, sleeved and unsleeved.

EDIT OCT 29,2024: Oh boy, I only just revealed that there was an with this file. How did this have so many dowloads and nobody tell me? Anyway, it should be fixed now.