Have you ever noticed that, in the official Star Wars canon, you never see a lightsaber leaning in a corner?

Print everything laying down in your favorite colors - it shouldn't need any supports. (Make sure the insignia is face-down on the print bed.)

Mount the wall plate with #6 countersunk screws. Glue the insignia in place (just to be sure), then insert the grill into the body & drop it onto the dovetail. If you want a permanent installation, glue the hook into place when you press it into the body, otherwise just jam it in solidly.

May the force be with you.

v3 - Updated hook interface with tab & slot.