MAC,
Check out:
http://www.go-rv.com/online/838/show...ils?catid=1893
Safety Lenses
3M VANGARD LENSES
Vangard is made of a thin Polyvinyl which adheres instantly without adhesive to the rear window of vans, motorhomes, and campers, to provide a greatly increased angle of view. Lets drivers see many things missed by rear view, side mirrors or regular wide angle mirrors.