I was in a similar situation earlier. It took me a while to realize there is a 3D printer right next to me on my desk
Must be getting old. $400 would buy a 3D printer kit and lots of filament to print whatever you wish/need/like. Thingiverse is full of various designs, many of them customizable.
Otherwise, Jaycar sells small component drawer sets. If that's not to your liking, only other suggestion is Howard's Storage shops. If they don't have what you want, they should be able to point you in the right direction. Storage is all they do, there must be something in their suppliers' catalogues available to order in even if they don't normally stock it.