www.bumperplugs.com is one of the very best Porsche vendors I have purchased from in my entire 6 years of Porsche ownership. Eric is a great asset to the Porsche community. Excellent quality and customer service.
The process is pretty simple. Just check his web site. Order in the color you want. Pay a refundable core exchange, when you put the painted ones on, you send him yours for the core exchange. I think the cost is about $250.
A great and simple mod. Makes the car look "fresh" and updated.