Sun roof

[SimonB]

Hello all,
The sun roof on my '36 light 12/4 Ascot has been blanked off at some time in the past. Has anyone got any drawings, photos, instructions or notes regarding the design of this please? I doubt if the construction changed much from the heavy 12 to the light. I also need to know what fittings I should source so photos of existing lock, handle anything of that nature would be useful. Also any info or advice regarding type of material for the head lining and how to fit it.
Any information would be greatly appreciated.
Many thanks
Simon