I had the idea after seeing a bmw with something similar. I took a spoiler off a hatchback and them custom fit it to the contour. The project was really never finished. Hopefully Big Poppa will let me see the finished product. I really think it would look tight molded to the tour.
I would not suggest trying to do it yourself unless you know how to do some body work or have lots of time and money to learn.
You can email me if you have questions.