I've been looking for some and will post some when I find them. I don't really think that someone would steal them, if they really wanted something off of someones car they will get it anyway, like soft tonneaus, window visors, etc.
we would sometimes have rental trucks at work, and we would stic our work logo on the side of the truck, the magnetic type. darn logos wont last a day, sombody would just swipe them. the logo is pretty big too, about 2'x2'.