I had this same thought a few years back when I was riding around in a company vehicle. The car had a big door magnet on it with the company logo on it, with that in mind I thought it would be really kewl to do something like that with a hockey strip or billboard.
However those magnets are not cheap and if you are going to frow the money down you might as well get the real deal.
Don't want to spend the money, do an image search on google and I'm sure you will find someone with your car color and stripe.
There is always photo shop or other paint style programs that might give you a better ideas as to how it will look as well.
Good luck!