Sauce is tamari, ketchup, garlic, ginger, and sambal, and I air fried the soy curls with habanero powder, tamari, and more garlic and ginger before tossing them in the sauce. It's a terrible picture but it's delicious, can recommend.
Butler's is what I get, i just order them from https://www.butlerfoods.com/soycurls
I think local food co-ops or more natural food stores often carry them as well. They're so good, and they last a long time. Definitely worth trying out.