Where do I find "Top Secret" file folders.

Suro Posts: 26
edited July 2013 in Practical Filmmaking
For an upcomming short film I'm looking for a very special kind of file folders:
No matter where I looked, I can't seem to find that certain folder. And I kind of want this certain kind of folder, since I am very fond of the look.
It basically "screams": "I contain sensible date. Don't read me."
Can anybody help me?