Custom Sabers for Quest are provided by the Qosmetics mod. The latest version can be found in the #quest-mods channel in the BSMG Discord. Sabers are called whackers and are currently hosted in the Qosmetics Community Discord. Legacy filetypes like .qsaber made for older versions can still be used. .zip files can also be used but will require you to extract only the .qsaber.