I am not sure if you were looking to repair a small area or if you were looking to replace the whole headliner. If you were looking to replace the whole thing, Maud may still be able to obtain the material that was used on the late model SM. Ours is hull 466 and we were able to purchase some from Maud about 2 years ago. It is a white vinyl material with padded backing.
All the best,
Paul Stascavage SM #466 - s/v Rita Kathryn Currently Exploring Norfolk, VA
