Hi Jane, A member once posted a message about using the plastic drawer-type storage units commonly found at big discount stores (I appologize that I can't find the original post ).
I went to Wally-Mart and found the same drawer setup. It's made by a company called Sterilite. The drawer system is called a "Clearview" and has 3 sliding drawers. Each drawer is 8 1/2 inches wide by 11 inches deep by 2 1/2 inches tall. Entire unit (all 3 drawers and plastic cabinet) is 9 1/2 inches tall by 12 inches wide. I just cut my own cardboard dividers for each drawer and since it's almost clear, it works GREAT for me. I know I didn't pay more than $6.00 for it.
It's not very portable (drawers don't lock shut if tipped forward), but works super at home.
Good luck!