we had LV insurance replace ours as part of the glass cover.the excess was higher than windscreen or side glass but I had the crack with the gutters at RAC auto windscreens and it’s only 2 bolts per side.pop the roof up and you can get to the bolt heads.although I’m sure your insurer would replace the whole lot through glass cover cheaper than you could buy the sunroof.🤷🏻‍♂️