Need to buy a windscreen kit...
 

I just purchased an 03 Boxster but it didn't come with the windscreen kit (plexiglass and two screens for headrests). Who has them?

Check here:

http://e-partssales.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=P&Product_Code =00004480078&Category_Code=POTEBXTR


And check for better pricing at www.sunsetporsche.com

You will probably have to buy the mounting kit from Sunset, Eagle Day, or Suncoast.
The windscreens occasionally show up on eBay and craigslist for like $50-100, or try calling a Porsche dismantler / salvage yard. In my opinion though don't waste your money on the black plastic mesh inserts there useless, and decrease rearward visibility, but the plexiglass windscreen is worth it.
:dance:
Hope this Helps! :cheers:

Rick3000, is correct, here is the kit you need too:

http://e-partssales.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=P&Product_Code =98656132300&Category_Code=POTEBXTR