Unfortunately, the 10 Tray Utility Box
has been discontinued as has Amazon.com: Performance Tool W5199 Organizer Tote with 1,000pc Home Fastener Assortments : Arts, Crafts & Sewing is still available though, though a similar size of container is used by some folks selling on Amazon for various hardware (but I haven’t been able to come up with a search which will find them reliably — if folks find any gems which come in such packaging I’d be glad to hear of them — this packaging also has nice removable dividers and a latch (usually blue, I’d love to find other colours so as to do colour coding)), though unfortunately, it’s too large in one dimension, and also:
(at least the square ones)
So, I’m going to pivot to:
and Gridfinity:
and probably the new mini toolboxes such as:
https://www.lowes.com/pd/Kobalt-Mini-10-83-in-2-Drawer-Black-Steel-Tool-Box/5014017009
https://www.lowes.com/pd/Kobalt-11-in-W-x-7-4-in-H-Friction-3-Drawer-White-Steel-Tool-Box/5015171619
https://www.harborfreight.com/mini-steel-toolbox-black-72431.html
probably creating a Gridfinity/2 fork (based on a 21mm grid) which hopefully will be workable, and incorporate the South Bend Maurice Sporting Goods #UB6 6 Comp Trans Tackle Box linked above as at least the current project tool organizer since it’s working well for that (though I may make a small mod to help that).