Hi Andy
Excellent idea with the sunstrip sticker!
I've come across a couple of companies in the UK specialising in car stickers, for example for E.stickering up your vehicle when you're going to Le Mans. This company seems to be one of the better ones:
http://www.hollographics.com/AFAIR the font is a sans-serif typeface like Helvetica or Arial. I think you should be able to make a nice reproduction if you take a photo of the rear panel, and then use the photo as a lower layer on the drawing app on your computer, and stretch the typeface until it matches well.
- Anders