We have some listed here:
https://www.homemadetools.net/site/search?q=toolbox but yes, it's a rarer build. My best guess is that homemade toolboxes fall farther away from the "sweet spot" of homemade tool building. People are generally building homemade tools when those tools exist at the desired confluence of a variety of factors: utility, cost, ease of building, market availability, customization, task specificity, etc.
If the combination of those factors is not within range, then sometimes it's just best to purchase the tool (occasionally modifying it to suit your needs), and focus your tool building efforts elsewhere. This is somewhat of a paradox of toolbuilding: the time you save by buying a tool can be used for building another tool.
On the other hand, for certain tools, some builders want a level of craftsmanship that simply isn't available in the commercial market, and they will build that tool to their specifications. For toolboxes, a good example is
this oak/walnut/maple machinist tool chest by DUKESALLEY.
For tool organization, something that I am watching for is DIY 3D printed clear tip-out bins. Ideal for fastener and part storage, but expensive enough that their use is mostly limited to the medical and dental fields, especially for the large scale storage that we would need. Sometimes you will see them in older hardware (not big box) stores. A setup like this (perhaps 4-5 times as large) would be a huge timesaver, and would greatly ease ideation, because you could visually scan all your bits and pieces at once. However, it would cost thousands of dollars.
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