Is there a college near you? It would be way easier to find a reliable dealer at a college than at a high school. When I was in high school we had this program where we could go to the college and take classes - I don't know if you can do something like that, but if you have the option, it is (1) a really good way to get out of the living hell that is high school and (2) an excellent way to get a more reliable hook up since nobody is running around trying to keep it secret from their parents.