It is pretty simple to do. Watch some videos on soldering. Go to ratshack and get your self an iron, some solder & flux.
Open up the speakers, look at the caps and list what is printed on each one. Order them from P.E, or Mouser. The value is important, not the volts, which can be higher with the new caps. As an example, it may say 2uf-50V. The replacement may be 2uf-250V. 2uf value what you need to match.
I've done a bunch of re-caps now, it's easy. With my first pair of KLH Six's, I felt just as you do now. Once you do it, you'll feel great knowing you did it.
Post pics so we can see what's inside your speakers and help you along.
I'm swamped with work at the moment, or I would help you do it for sure. I'm in northern Westchester.
Glenn