Peter M. Eick ...
What are the drawer demensions on that array? Where do you sorce it?
Right now, I'm using Rubbermaid Sterilite modular drawers similar to this.
Available at Wally-world for about $4. It comes in 3-drawers sets and each drawer measures approximately 6"w x 10"d x 2.5"t
I have zip-tied the stacks together and to the shelf they rest on. They are quite stable.
I've been searching for somingthing like a library card file or a microfiche file, but not having a lot of luck at my price point.