For several years our team (the Hebrew Men’s Poker Association) used dried chiles that I pulverized in a coffee mill. The first time around, I did the grinding inside the shul, but I realized the fumes caused passers-by to gasp and cough. In later years I moved the grinding outside, using a 100-foot extension cord I brought from home. But the last two years we’ve been using chile powder from Chipotle Texas, which sells a variety of chiles in various forms and is supervised by the Dallas Va’ad Ha Kashrut. They deliver at reasonable rates, their powder is less expensive than the small containers you see at the grocery store, and you don’t need to worry about grinding anything (and thereby incommoding the passers-by). Something to keep in mind for next year.