Flavordisc is a 7th floor thing, so don't forget the new portable Elev8r uses one also.
Most other manufacturers that do this use stainless steel mesh pads, and some owners use de-gummed hemp or cotton as a substrate.
I think the ceramic discs taste extremely neutral, or even fresh.
The only other material I can think that manufacturers use for a pad is a glass foam pellet for the Aromed (not portable).
Other options are to use the flavordisc in another vape that it fits, or you could look into ceramic based pens and atomizers too.
Hope that's what you were asking!
Thanks for posting that video I didn't know you can also use the discs as a heat diffusion spacer on top of herb.