yeah, when i was in school, i sent in my backpack because the zipper broke on me (just the end part...i could still zip/unzip) but i sent it in and asked if they could send me the same one, or one similar. i got a similar one...still same color, but just a different embriodery fabric strip. 2nd time my strap broke, so i got another one, also similar. but then my dad lost it when he went to sea world. you can get the mailing bags at campus bookstores (i went to ucsd) or even sports chalet.
so, to replace my lost backpack, i got a "north face" one....they also have lifetime warranty. so far so good. had it my last year of college. still use it today for trips. hopefully i'll be using it more when i go back to school.