I went to a couple local (Portland, Maine, area) stores today and found Stella & Chewy's foods, albeit in very limited amounts: one bag in one store, two in the other. Both said they've been getting some S&C food but not a lot. Apparently frozen morsels haven't been a problem, just the freeze-dried. And one store hasn't had any problem with the little packets, but that's not very helpful to people who feed a lot of the stuff.
I hope you're able to get what you need soon, @stephgas!
I hope you're able to get what you need soon, @stephgas!