[Kirk]

I did a quick search on eBay and couldn't find it. There was someone on there that sold an add-on lower bumper lip like you're looking for. You can see a picture of it on Max Ferran's 996 in this thread:

http://www.986forum.com/forums/showthread.php?t=19374&highlight=996

That's the best looking option that I've seen.

Be aware though that this isn't necessarily a cheaper route to go. Look on eBay and you'll see complete bumpers for $400 to $1,200. This add-on lip was like $400. Plus you need to possibly do more body work to get the lip attached and smoothed out (it's fiberglass). I got a 996 GT3 full bumper for $400 and it's PU and required very little prep work before painting. With the lower lip add-on you're probably looking at the same cost in body work/paint as what the lip cost. So you might want to consider just going to a full bumper for not that much more - or in my case actually less.

Gemballa makes an add-on for the rear:

http://cgi.ebay.com/ebaymotors/GEMBALLA-PORSCHE-BOXSTER-S-REAR-GT-REAR-DIFFUSOR_W0QQitemZ170262992958QQcmdZViewItemQQptZM otors_Car_Truck_Parts_Accessories?hash=item27a4771 83e&_trksid=p4506.c0.m245&_trkparms=72%3A1205|65%3A12|39%3A1|240%3A1318

Kirk