Here are a few links that may be helpful to you.
Local music store. Go here for instrument rental information and music supplies.
Volkweins Music
This is a great site about music theory that includes lessons and interactive quizzes.
MusicTheory.net
Musicians Friend is an online store for music supplies.
Musicians Friend
Woodwinds and Brasswinds is a great site for purchasing instruments, books and supplies for brass,
woodwinds, percussion, and strings.
Woodwinds and Brasswinds