I've seem to have lost the plastic cap that goes on the end of my power adapter (the end that plugs into the computer) for my PowerBook (15" 1.67). I'm just worried that the metal is going to get bent much easier without the cap. And, of course, it's just annoying knowing that the cap is lurking around somewhere in your house. So is there any way I can replace it without purchasing a new power adapter? Do they have a bag of power adapter caps like they do rubber bottoms for the computers at the Genius Bar?