Thanks for the responses!
I appreciate the suggested decks too, and I've been using them for that purpose; it's just that I can't have them and my own decks built at the same time.
I totally understand why PBE might not want to give access to all the factions and mechanics via PnP; there's a certain percentage of people who would think "oh, well, I don't need to buy the game, because I can play every faction for free..." Which is why I was just thinking of the core set factions.
Maybe they could make a set of the 6 pre-built decks available to stores and TOs to purchase for doing demos? I can't justify buying multiple copies of all the sets just to have teaching decks on hand, but I'd certainly buy some preconstructed demo decks if they were out there...
Anyway, I'm not going to stop teaching the game regardless, it would just be more convenient.