These mounts have held up well over time. Optionally, increase the thickness of the open hook if you want more stiffness in the mount.

Designed for a lightsaber with a handle width of 39mm and blade with of 25mm, but the customizable OpenSCAD file is included if modifications are necessary in order to fit yours.

I used drywall anchors and a piece of #10x24 threaded rod to attach them to the wall.