I used to have some kind of ceiling tile, forgive me if I'm wrong on this, I recently lost all of my CC and game saves and whatnot, so I could be wrong. But I remember having some kind of large stone circle ceiling tile, I think it was sort of ancient church/cathedral type ceiling tile. It's not much, but it was something. I believe it was in a download pack with roof additions that were for builds like castles and cathedrals and such. Apologies that I can't provide an exact link, I think it was by FelixandreSims. Good luck!