Mabe someone can help. I removed the factory installed roof rack on my 04 Range Rover and have 6 opening (1/2" x 5") left where the rack was mounted. Question: do I need to cover these openingor just the threaded holesfrom the water? Are they sealed to the interior? Whould anyone know where I can purchase the 6 filler plates that were originally there when it was built? Thanks.