Just a thought here (and I am one of the one's who is against Teflon - it's not only about the off-gassing at high temps, it also emits a nasty chemical when produced which has been found in tissue, soil and ice samples globally) .... Not to mention when it "wears out", where does the coating actually go? Into your food methinks ...
I don't have a smoker (can't do it at my apartment), but plan on buying one for my place in the Gulf Islands.
How would a silicon mat work? I have a silicon splatter screen that you use when frying, and also have what's called a "Sil-Pat" [
http://silpat.com/] for baking. The splatter screen has holes in it (so the smoke could travel through), or you could punch or cut holes into the Sil-Pat for the same effect. Sil-pats are expensive, but I have also bought knock-offs at Superstore ($10 versus like $50), and they work pretty well too.
Not sure if they would work, but thought I would throw it out there ....
Lemme know if anyone tries it out!