I found the design from the post here:
http://www.e90post.com/forums/showthread.php?t=734628
(post 10)
Forgot to mention that if you're dong this, you will need to use paint or photoshopmetc and flip it so it's printed in reverse as you're sticking it on the inside of the window.
Then downloaded and printed it on this:
If you're really struggling, I don't mind posting you one
