Durham 102-95 Gray Cold Rolled Steel Large Scoop Box, 18" Width x 3" Height x 12" Depth, 24 Compartment

They came from Durham manufacturing. I can be bottled on Amazon, but if you search around and watch the pricing there, you can usually find a good deal. They were on average about $25-$30 each I would guess. I also have the slide racks they go in, turning them into drawers effectively. https://a.co/d/0fEZcnzh