There are three channels you should visit if you want naruto shippuden music. Chhidori's channel has all the soundtracks including the movies counting the 6th as well. He also makes high quality unreleased songs ripped from anime episodes. 94face and gostone make unreleased soundtracks as well from both the first and second series. I suggest checking them out if you can't find your favorite song in the original soundtracks.
Unreleased Anime Soundtracks! - YouTube (
http://www.youtube.com/user/94lolface)
Chhidori Studios (
http://www.youtube.com/user/Chhidori)
Welcome to My World - YouTube (
http://www.youtube.com/user/gostoneph17)
You certainly are a dedicated Naruto Shippuden music fan to find updated and to follow channels like these !
Thanks a lot leatherhead93