lol, let's not get ahead of ourselves, easy is a relative term in this instance, foothead means well, but easy to one of us may be too much hassle for someone on the outside...
what you can do is get the cap (all the information you need should be on the cap), go to radioshack, find a replacement (if they have one in stock), desolder the old one, take it off, put the new on on and solder it in...
simple to some, too much hassle for others I guess, the person at Staples just assumes that you're one of the 99.9% of the people out there who don't want the hassle...
considering broken, yet fixable parts disposable is actually pretty common in the computer industry, just swapping out a bad part with a new one is more time efficient in most cases, especially when you can just bill the new part to the company and it's not coming out of your pocket...