Ender-3 "Trash" Tray ("Trash may actually mean "Basic Tools")

I've recently gone through a process of upgrading one of my Ender-3 printers to a linear rail kit, a Volcano high flow, ceramic cartridge hotend (compatible with my [volcano and E3D V6 ghetto X truck mods](https://www.thingiverse.com/thing:6742634) ) and an MKS Mini E3 control board. As the parts arrived, I realised that the E3 units have this trashy housing for the controller, with no easy access to the top of the board. So a quick google about found this Thing - the [Ender 3 Upright Mainboard Case](https://www.thingiverse.com/thing:5538027). I used up the near last of an exceedingly old roll of blue and printed one.

Now I need something that "matches" it (won't be the same colour) to chuck my basic tools in. The surface around my printer is a mess of hex keys, screw drivers, side cutters... you know. All the trays to do this a complex drawer prints and I just want a quick-and-dirty wall around the basic bits and pieces. Anything more advanced in terms of tools are kept at my work