A lot of us who rather not pay the exhorbitant price that an OEM m-sport lip commands have had good results with Selma on Ebay. The fitment is not perfect, but usually much better than the stuff that comes from China.
Here's a thread that talks about some nit fitment issues with the Selma lip. You'll have to decide whether a lip that is 1/3 the price of an OEM one is something that you can live with ...
http://f30.bimmerpost.com/forums/sho....php?t=1262023