I have been looking for a very specific letter tray for the past year. I know I've seen it in stores a couple of years ago. It is basically one of those corregated paper letter trays with 5 or 6 slots in the front for students to turn their papers in. The slots were just big enough to put a 8 1/2 by 11 paper in, but not get it out. In the back was a "door" that you open to get the papers out. Has anybody seen or used one of these? Do you happen to know what the brand is or where I might find one? I have high schoolers with sticky fingers when it comes to "borrowing" other students work to copy off of.