Where can I buy a new notebook backpack in Munich?

... my current one got busted during my journey to Munich :) and I don't know if it's going to last me anymore. I tried the Apple Store but they didn't have much of a selection range. Also a couple of other places I checked out near my hotel had only 1-2 models.

If you could give me a google maps links or something, it would be great.

Thanks!