Just made a few of these for fun. Printed, stamped, assembled and cut by yours truly! Moo is a pretty good online resource for layered cards like these, but they only provide a small number of colors and trim to the European standard.
Well.. my SD card broke this week, along with my Macbook not long before - So I apologize for the lovely poorly lit cellphone instagrammed photomajigger. I'm working on repairing the situation.