Wasteland Champion Tire Armor by swanboy. I imagine a tire would actually absorb a lot of force from blunt instruments. (It also blocks a lot of cutting weapons, it just needs a bit of padding underneath it)
A fun infographic from Newark / Element 14 detailing what you need to do to build your own lightsaber at home! If you’re on the front page of the site, be sure to hit the “read more” link below for the full infographic!