Does anyone know a website that sells San Pedro powder in the USA, that way it doesn't have to go through customs??
Yes, but don't wanna post it here and risk getting banned. It's through a very well-known site and vendor who sells several different cactus varieties. PM me if you're interested. I've used them before and was very pleased.
san pedro is going to be in short supply and overpriced in dry form from domestic vendors. might want to hit up a cactus farm for some cuttings and start your own little pedro patch.