I bought a cord and socket online to hang from the ceiling but could not find a lampshade to fit the over-sized socket.
Luckily, the metal collar lampshades come with are friction fit. They can be removed with just a pair of pliers and a little bending.
3D Solutech PLA
Finishing it up ...
Optionally, glue the metal lampshade supports into the printed piece for extra strength and security.