I printed the cable cover and the mounting bracket in black PLA. The lampshade in offwhite PLA with a 0.6mm nozzle in vasemode.

The mounting bracket needs two M4 heated inserts and two 8-10mm long M4 screws.

The bulbholder needs a 40mm external threat with fitting nut for combining the lampshade and cable cover (if the threat is bigger in diameater you can easily cut the holes bigger).