| Hi.
Foam, wood, nails, duct-tape: all band aids. Exept for wood if it's used as rear rails.
Rear support rails is what You need, but those don't have to be factory made if the configuration stays the same for a longer period of time. Angle iron, framing angles, strips of wood etc. are a decent substitute if the airflow isn't obstructed.
Regards
Sam |