Jim,
I was actually able to determine what the material composition of the original heating element was and went from there. When I first started this project I was new to the world of ceramics but I now have a better working knowledge. Working at a Failure Analysis Laboratory helps too!
So to answer your question, Jim, it's made out of ceramic, not a plastic or glass.
At first I spent a lot of time trying to find a "better" product. That didn't work so well. Most products I found were WAY to expensive in their raw form and that was before machining and firing.
Larry - Yeah, it worked out well, grand poobah? Naw...unless I get a really cool hat to wear!!