Re: pictures of NEW 19
Just becuase they are one piece doesn't necessarily mean you can't just have the centers powdercoated. (Although I agree it is easier with the two or three piece) Many powdercoat shops can literally mask off areas they don't want to get powdercoat on with high temp tape. You could also go back and have the lip polished after powdercoating the entire wheel, this is also pretty common.
A guy by the name of "Ram Air Tony" on the corvetteforum had a set of black powdercoated Z06 wheels with a polished lip. Those wheels are also a one piece design.