Had it done by a local body shop that I trust. I believe they charged me $250 which included the labor to remove the old ones, clean the surfaces on the door, paint the new ones and install.

I don't have the part numbers off hand but if you want to verify, you can call the local BMW parts dept. near you and ask them for it. I asked for the part numbers from them and actually ordered it via getbmwparts.com for a significant discount. The parts cost online was around $200 if I remember correctly, the dealership wanted $400 plus $400 in labor to paint and install. I'm in it for around $450-500 total.