I have a MacBook 2008 13" Unibody, one of the speakers crap out and makes a crackling noise. I suspect it is he right speaker with the subwoofer. I am having a really difficult time locating replacement speaker online. I have seen couple used ones and the only new one I could find is for $50 which is a bit rich since the laptops are selling for #300 used on ebay now. Do you know of any online stores who cary speaker replacements parts?