I have a dealer-fitted sunroof in my calais. It doesn't leak and works well. Problem is, i had to remove the head lining to get it working right and I can't get anyone to re trim it. Furthermore, to facilitate the original installation, one of the centre roof spans was cut out. As a result, the car creaks terribly when travelling through gutters etc and the sunroof cartridge rattles. I have read about turret replacements and patching but wonder whether a black perspex panel could be installed? I would have the span rewelded and a standard headliner reinstalled. I understand that the panel would be non-functional but would retain the sunroof assembly to go with the car if I ever sold it. Is there a rubber seal that would hold the prespex in? Could it be successfully sealed? I an interested in options.