I have a 2007 Toyota Tundra double cab SR5. I just purchased an OEM toyota navigation (from a 2007 tundra). I want to add a back up camera and was wondering how I would go about doing that. Is it possible to buy one and connect it to the navigation? I would like to buy a original but am confused where to buy one at a good price. Also, do I need to buy a separate screen or would the camera work with the navigation lcd. Thank you for your help.