This is a very basic tool mount for the tools included with the MINI/MINI+.

To mount it to the aluminum extrusion, you need two nonut 2 mm clamps from the following page:
https://www.printables.com/model/50713-nonut-2-mm-clamp-for-aluminium-extrusion

The cover seen in the third picture can be found here:
https://www.printables.com/model/51115-nonut-cover

Check out this great remix using magnets:
https://www.printables.com/model/51197-magnetic-toolholder-for-prusa-mini

Print instructions

I print in PETG with 0.2 mm layer height and 100% infill. Feel free to share your own instructions. Happy printing! :)