On Fri, 21 Aug 2020 05:21:09 -0700 (PDT), Tricky Dicky
wrote:

If you do have to resort to making them, then a piece of square section drainpipe cut up into the depth you require with either a plastic sheet cemented to one end or a plywood insert fitted should be a cheap way of doing some,

Another practical 'd-i-y' solution you won't be thanked for. ;-)

just that you are constrained by the size of the drainpipe.

Quite and how well they happen to tessellate in the case.

The problem with any 'off the shelf' solution is how it might cater
for your particular combination of screws / whatever. I know nearly
every storage solution I have used ends up being too big for some
stuff and too small for others (in size and / or quantity).

Whilst ye-oldie J^n stated a range of sizes in the boxes he can't
afford, it's possible that even those might not cover what he needs as
well as a diy solution *would*. And, because they would be so cheap,
he could have all sorts of 'mix n match combinations, as he needs
changed?

And also you could ensure they tessellated at the same time. ;-)

Cheers, T i m