Here is a little contribution from my side.
Free 3D models of a LightSabers - all uv mapped and textured. Bundled with Maxwell Render materials.
Luke Skywalker - https://drive.google.com/file/d/1hgTkCx2jivpN3oz7H7CemDPWr-pYMKDq/view?usp=sharing
Darth Vader - https://drive.google.com/file/d/1dSveCx62IUamQyRJ0UPbTKt22F6dVWF9/view?usp=sharing
Master Yoda - https://drive.google.com/file/d/1y9sc5pXrjMV7gPatoSyu0UohbobcsrY_/view?usp=sharing
Or grab all of them here (also free) - https://gum.co/VxBPZ
All Lightsabers come with a set of 2 MXM materials.
Everything is rendered with Maxwell Render on a 4 cm grid for your reference.
Feel free to use them as you wish.
P.S. - Drop me a line if you want to have a high poly version of those lightsabers.
P.P.S. - If you don't need Maxwell Materials you can download low poly models with textures (straight from Substance Painter) from my Sketchfab page.
Luke Skywalker Lightsaber - Download low poly from sketchfab
Darth Vader Lightsaber - Download low poly from sketchfab
Master Yoda Lightsaber - Download low poly from sketchfab