ᐅ Looking for storage boxes for Ikea Besta units

Hello,

I have set up a cabinet in my office for boxes containing various small items (cables, mice, tools).
At the moment, I am using the old cassette boxes (see attached image).

Unfortunately, the cassette boxes are not really stable enough for this purpose, but I cannot replace them because they have been discontinued.
Neither the Bestå boxes made of felt nor the Smårassel boxes are suitable, as they are too unstable.
Samla boxes almost fit, but then the door won’t close anymore.

Therefore, I am looking for wooden or plastic boxes that fit inside the cabinet, preferably two side by side as before.

I would appreciate any suggestions.

Thank you and best regards,
Tobias