Spy Invites

I'm in search of paper or rubber stamps with the Spy vs Spy guys. Another invitation project I was asked to do has the theme of "Spys"

I want to use a cootie catcher (I was told that's what it's called) as the base card. With all the secret panels I thought it would be a fun way to get the clues to where and when the party is. It will be delivered in a plain brown box tied with string. After making one cootie catcher, it looked like the spy guys heads. If anyone knows of a source for Mad Spy vs Spy please let me know.
Yes, between all this I'm still working on getting all the boxes in my house sorted out.