I have a 1987 yj that in the summer I like to drive with the doors off. I have a dog (my best friend) who loves to ride, but wants to ride in the passenger seat instead of the back. Even with the passenger side door on I don't feel comfortable with the safety for him in the event of a swerve in direction. Does anybody know of any manufacturers of net type door closers, similar to the window covers on NASCAR race cars that can be attached to the door frame to keep him from accidentally falling out of the jeep?