Man this is expensive but thanks for tracking down the part number. I am really tempted to go this route, I don't like the water sitting in these channels. With the silicone at the bolt holes, the water is blocked from flowing all the way down the channel so it is just going to sit there until it dries up or finds its way into the car. If I got this stuff I would probably put a bead of caulk down each side so that the water doesn't go in the channel at all.Just talked with my dealership. They said it's $85 CAD/piece 😬 I found the person on instagram.
But for > $200 to do the car...yikes