Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5239352.
I've remixed another design I liked to improve it in the following ways:
[] Mirrored the Allen keys for placement on a right-side wall, rather than upside down [] Added room for a small spray bottle or glue stick (emphasis on small due to size constraints) [*] added a hook, either for pliers or a microfiber towel (requires support block at the base)
This is now more suitable for mounting on the wall, and should hold all the tools you need for a CR-10, Ender 3, or even a Prusa MK3.
BTW, I know that the Allen key holes are a bloody mess, having 2 holes that merge in the middle... I don't know how to fix it at this point and I don't have the energy - plus, you don't see it and it doesn't affect usability, so I have no reason to do it. Feel free to remix and fix it.
Enjoy :)