You have probably looked already, but did you try ebay? I think you can post what you are looking for there somehow.

Are they these? http://www.challengecards.com/ They don't look exactly like what you describe, but wanted to mention them.

This is a crazy idea, but it might be worth writing or calling the school you attended to see if anyone remembers/still has any.

Last edited by ConnectingDots; 09/16/13 09:05 AM.