I was looking for a wallet that I could use with just a few credit cards, my work ID, but still hold bills. This does it great.
I included my .123dx file in case you want to modify it. The 123d file has several sizes and one that that you can print in 2 parts and screw together.
The back side of the wallet is open so you can put your drivers license or ID card facing out. I use is for my NFC work card.
Finally, if you can figure out how to 3D print that money that is showing, let me know. It will be our little secret.
print it, put money and cards in it, put it in your pocket.