When I wrote the recipe for Souper soup, I didn't realize that I was going to learn about a whole new group of ingredients, the chili and curry pastes from Asia. My favorite is Thai Kitchen Green Curry Paste. I also like Tom Yum Paste Por Kwan (chili paste with holy basil leaves) from Thailand.
Oddly enough, I got involved with these in Brattleboro, Vermont, which now has an Asian and an Indian grocery.
Similar products can be bought on line from Importfood.com or ThaiChef@Importfood.com.