The part number is 996-631-046-01. I also lost one also (driver's side 996-631-045-01). My local dealer wants $50.91 for it. I have found the smoke colored ones online at
www.pelicanparts.com for approx $30.00 each. It seems that no-one stocks the amber anymore.
If anyone has done a headlamp switch to the euro clears and has one collecting dust, I'd be interested in buying it. It has to be with the washer option though.
sparky