need speaker mod/repair help

I lost a 61/2" woofer in a psb Mini-Monitor to some type of power surge. I purchased them used and they are no longer under warranty, that I am aware of. Are there after market woofers you can recommend that would provide better sound/detail/imaging? Will a dealer sell repair parts or are they going to want to service it themselves? What should I know before I remove and attempt repair? I realize I will have to replace woofer in both if I go other than psb.
Try WWW.MADISOUND.COM. Also, try Van L. Speakerworks in chicago (on Wentern Ave.). Good luck!
You know it's blown, so remove it. Does it say a name other than PSB on it? If it only says PSB, I would try ordering an exact replacement from PSB (forget about the dealer, unless PSB won't sell you the replacement directly).