Light fixtures for Parlour Floor

I am trying to find some replacement light fixtures (chandelier or pendant light) for the two rooms of the parlour floor.

They were old gas lights with fancy-pants medallions. The electrician I spoke with said I needed to find fixtures with a bell-shaped cone at the top (see pics).

Does anyone know if you can buy these cones and attach them to any store-bought chandelier or pendant light?

Thanks!

By townhow |