have something simular in my bus (came installed when I bought it) and it does work well as a back up. Has helped me not run in stuff here in the house. I would recommend it.
i ran my cable down along the frame and still had a lot left over,and yes i have one left to sell,$55.+shipping ..ill take a money orders from the post office.
just pm me with your zip code ,so i can check out the shipping cost ..