Cardboard flats for storing micromounts

I'd like to find the cardboard flats that dealers use at shows for showing/storing micromounts and thumbnails. They're made from light brown cardboard, have lids, need to be stapled together. and they're about 1 1/2 to 2 inches tall. Does anyone know where I can purchase those?

I think they'd be great for storing my growing micrmount and thumbnail collection. Any information is greatly appreciated!

Thanks,
Robert

[www.rockboxes.com]

Thanks David!

Robert

If you make it to Denver or Tucson shows, there is more than one company there who sell
flats, so you can pick them up right there and make sure that they are exactly what you
want.