Don't buy...build.
Go to home depot and pick up one of those plastic utility racks.
You can cut the tubes down to the right height with a hacksaw quite easily. I cut them so that 41 qt latchtop boxes fit in them snuggly.
Slap the rack together, through on some heat tape, and you're looking at a 5 slot rack for about $100 with tubs and heat.
Get two and you can build them higher.
I've also heard of people attaching pegboard to the bottoms of the shelves and using the boxes lidless, but I have cats that get into everything, so...not for me.
This isn't my pic, but it's the general idea. 41 qt boxes fit in lengthwise.

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"What is man without the beasts?
If all the beasts were gone,
men would die from great loneliness of spirit.
For what happens to the beasts,
soon happens to men.
All things are connected."
-Chief Seattle (Duwamish Tribe)