OK, the parts are now being sold. Here is one link:
http://e-partssales.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=P&Category_Code=987s
But I think you can get better pricing from
www.sunsetporsche.com.
FYI- dealer costs is $1,435.43 (w/Sport Chrono).
A fair labor quote for install would be 3-4 hours (again with Sport Chrono). Without SC, labor will be another 1.5 hours (to install the switch in the front). Some dealers are quoting crazy hours for install...like 7-10 hours!