I currently own a pair of Polk Monitor 12 Series 2 speakers. My problem is that both of the SL 2500 speakers are shot. I would like to replace with new that would be great but I doubt that will be possible. What about the SL 2000's? Does Polk sell these tweeters on line? I can't seem to find a link on the page as to where replacement pieces can be had. I really would love to get these great speakers operable again asap.