yes there are kits... and some very nice one's at that. go ask in the forums here:
http://forums.vwvortex.com/zeroforum?id=1055 Should get plenty of input on gettin the Audi down. Is it an A4 or an A6? Here's a bagged '06 A6 Alot of the VW / Audi guys like Bagyard products. I believe they're built around modified Bilstein struts so still provide top notch dampening.