Are the BMW Performance ones sprayed? I will have a look the the brochure see if they're in there.
I got them off Phil Cafe.Racer in Carbon Fibre but I decided to get them sprayed for the more subtle look as I wasn't 100% sure on the Carbon. You can get them off ebay for about £100 all in.
Fitting is a 5min job. You loosen two small bolts under the front of the bumper then clip them in place and re do the bolts. They fit so snug they would hold themselves there!