Is anyone aware of an after-market roof rack for the Model S without the pano roof? Or any company that might be working on one? I can imagine it could be difficult to make it work with the frameless doors, but the roof rack companies like Thule and Yakima and Whispbar make fit kits for all kinds of cars. I was aware when ordering our Model S that there was no roof rack option at the time, but I was hoping someone would eventually come out with one, and the lack of a rack is one of the few reasons we still need another car.