Here's some actual ceramic ones:
http://silversurfervap.c...eramic-flavor-disc.html
I don't know about using them as a "Replacement" (as in for putting into a GVG), because I think they're a different size. But to use in a homemade contraption like a machine they should be great.
No direction but to follow what you know,
No direction but a faith in her decision,
No direction but to never fight her flow,
No direction but to trust the final destination.