The RX7 that I bought definately has one of these air dams. The previous owner said it was from "Erebuni". I have no idea other than that. I can tell you that the center has a bad tendency to sag, especially in hot weather. I strapped it so that the center is supported and holds it shape. I'm sure there are several ways to accomplish this. The nice thing is that it is very forgiving when loading the car on a trailer, which happens to be the biggest pain-in-the-ass that I have with my new car.
Wish I knew how to attach a picture.
Scott