Call the AA number in the phone book and ask them for listings of Alateen meetings in your general area.
Even if you have to drive him and pick him up, it would be very beneficial to him to 1) find he is not alone with having and addicted parent and 2) will get great peer support which can be so important at this time.
He will get good advice (and not coming from his beloved aunt, lol) he will identify with others as others will identify with him, and he will start to learn how to process it all, work and live a 12 step program that will benefit him ALL his life.
That's all I can think of right now.
Love and hugs,