Michelle Branch t-shirt/vest?

I was browsing some videos on youtube and came across this video: a href="http://www.youtube.com/watch?v=k5CmYthenvY&feature=related" rel="nofollow"http://www.youtube.com/watch?v=k5CmYthen…/a although i don't like the song i love the singers vest but can't find it anywhere. Don't suppose anyone knows where i could find it or a vest similar? Thanks :)