Would it be possible to make this?

[Jedi Master Dylan Marcos]

I'm actually a pipe fitter/plumber by trade. so doing PVC hilts will be easy to do if I can get my imagination to cooperate.

[FenixFire]

Ahem: Aluminum oxynitride (if he wanted as close to transparasteel as he will get):

https://en.wikipedia.org/wiki/Aluminium_oxynitride

I have no clue what that stuff costs, though.

Video testing it for Armor:

Well when a military RFP I have seen details it as "not cost effective" you can assume.

[FenixFire]

No it can be manufactured/shaped in most traditional plastic forming processes, so if willing to invest in extrusion dies and minimum quantity runs, tubes should probably not be an issue. This is assuming the material will reflow around the supports for the center that creates the hollow...without visible nit-lines.