I found a few Asian Home Gourmet seasoning packets in the import section of Carrefour supermarket. There’s a lot of different Thai, Indonesian, and Singaporean seasonings and some of them are gluten/wheat-free!
My favorite one is the Thai Red Curry. At Carrefour, each packet costs about 12 RMB. In the U.S., you can get them from Amazon.com or direct from Asian Home Gourmet for a little less than $2 USD.
Ingredients: soyabean oil, garlic, cayenne pepper, shallots, lemongrass, sugar, natural shrimp, fish, fish sauce (anchovy extract, salt, sugar), galangal, salt, pineapple juice, kaffir lime peel, natural herbs and spices