Is there something mass-produced that's flexible and consistent like gridfinity? As a non 3d printer owner, I've been looking for something I can just buy that would work.
Have you tried it in a private window? Search temu, amazon, aliexpress etc for the term I mentioned above. There are several Chinese vendors, so I won't give a brand. They are a set of boxes, a small square, one twice as long etc
https://share.temu.com/m885rYiehMB
Also on Amazon. Search tool box organiser or drawer organiser