I was curious so I looked around, have a look
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Seems to be quite expensive, probably better to head off to a local advertising/printing business that buys bulk and see if it's possible to get a deal. I did ride in a small vehicle (VW Golf) and I must say, although I wasn't driving , it seemed a bit obtrusive and kind of affecting the driving but I guess it takes time getting used to...Also, I'm not sure on this, but I think you need to have a bit of a distance to focus through these things, what I'm trying to say is that maybe having this stuff on your side windows might not be such a good idea...