EverythingButTheMusic.com sells official band merchandise, from Aerosmith to The Zutons, every genre Indie, Rock, Metal, Punk, R&B and more. We also sell band associated brands, example Vans Motorhead shoes. We are UK based but we ship internationally.
We offer affiliates 10% on all referred sales + 60day cookie. 
For in-depth demographics go here http://www.ebtm.com/page/affiliates