If you decide to try new swaybar droplinks then I can suggest these guys.
http://cgi.ebay.com/ebaymotors/New-Porsche-911-996-Boxster-Sway-Bar-Drop-Link-Links_W0QQcmdZViewItemQQcategoryZ33580QQihZ002QQit emZ120202434598QQtcZphoto
The bushings in mine were worn out which caused a occasional knock when going over bumps so I bought a few pair from them.
The price they charge is only slightly higher for a pair than what I found for a single unit when calling around to several places, plus they give free ups shipping which is a plus.