I can replace the water gun with pvc, but the washers and the polycarb plunger tube will be hard. And by hard, I mean I can't because I don't have any money. I also am very opposed to cutting the ring launcher apart...
Check out drain extension tubes at your local hardware store that has plumbing materials.There might be some that are close to the same dimensions as the polycarbonate tube Ice Nine used. The plastic ones are generally pretty cheap.
http://www.homedepot...790BG/205153709