This Vive controller connector/adapter can be used to build your own Darth Maul lightsaber.
The controllers are locked in place by wrapping the wrist bands around each other (see https://youtu.be/mzxLz1gSVyQ).
Included is a STEP file and three STL files. The file
beatsaber.stl is the one I printed, with a wall thickness of only 0.5mm at certain areas. Since people are reporting issues when slicing, I've also added
beatsaber_thicker1.5mm.stl, which have a wall thickness of at least 1mm and 1.5mm respectively.