I have a 2003 XJ8 that needed a new sunroof motor, which I picked up used & working for a good price, but they did not have the hardware. I have no existing bolts to use or compare to, as the motor was entirely missing, a previous owner had removed it and sold it. No parts directories seem to list this, and I'm sure they must be a specific size and length so as not to poke through the roof but to be long enough and wide headed/washered to hold on to the unusual brackets. Does anyone know the size I need so I don't have to play trial and error?