I'm going to throw my version out there too. I made this last year for a convention my sister and I went to. Looks like we had the same inspiration for our designs, haha.
I have a Photoshop template, Illustrator file and an image of the blank card, so you can use your own photo editor. The finished printed size should be 4.25 x 3.5
(for some reason, the test I did with the photoshop file kept printing slightly larger, but it might be something with my printer. The original Illustrator file worked fine.)