This looks like a cheaper alternative for the '09 guys.
DIY: Rearview Camera & DVD
it involves the navtool, and there are a few DIY's on it. Since we have such a large number of people from each model year, we have enough for two group buys from two different sources, depending on what people want to go with. However, the only feasible solution for the 2010's is the GTR camera rig in this group buy. the '09s can use either this or the navtool. i will call navtool tomorrow to see what we can work out.