Yeah, I made them myself. Kind of a pain, but it was worth it for presents. I did the design in AutoCAD (I'm a Civil Engineer) and printed on glossy 32# paper. There's print on the back as well, so instead of printing both sides and hoping they line up, I just printed side by side and folded in half and glued with a glue stick. This made them twice as thick and much more substantial. Cut them out with scissors and got a cheap grommet kit from Home Depot for $7. Took some time, but I'm happy with the end product.
Printing with a laser printer on glossy paper is nice because the ink doesn't smear even if it gets wet and the glossy paper is water resistant as well.
Cheers and Happy Holidays!