theres lots of motorsport 'waterslide decals' for 1/24 size model cars, but couldn't find any for real cars, though one could make their own using an ink jet printer
Inkjet Clear Waterslide Decal Paper for Model Cars and Nail Decals 1 Sheet | eBay
out of curiosity i called Raceline Digital, who suggested their 'static cling option' would probably stick to the interior side of the glass. they can make the decal any size you want.