Just a simple clip to get some light on your printer. LEDBERG from IKEA are cheap, they run on 12V and it's easy to work with them.
I took xonegon's basic shape of the original brackets and expanded it to snap onto standard 20x20mm Aluminium profiles.
There are two versions: dual, mounts right onto the edge of the profile. 45, has a tiny offset, in case you need the space. See the pictures.
Print these parts slowly, and make sure your printer is calibrated perfectly. Otherwise they may have a loose fit.
I recommend printing with ABS as it is more flexible than PLA. PLA may break, but I didn't test it yet.