I'm right there with you. I've been looking, but haven't seen anything that suits me.
To be honest, I would love to see a functional double decker wing that mounts over the stock piece so the center brake light is retained. The style I'm thinking of is like the 997 911 turbo wing:
I think it could be done even better than the styling of the 911 wing.
Anyone wanna photoshop that one?