I need a bunch (about 200) of cardholders. I'm talking about the little
metal frame that goes on the front of a drawer and lets you slip in a card
describing the contents of the drawer. These used to be standard on things
like storage drawers, file cabinets, etc. Size is not critical (2 x 3
inches seems about right). Cheap is good.

This seemed like the kind of thing Lee Valley would have, but I didn't see
them in the Hardware section their web site. Can anybody suggest a source?