These hat lampshades are part of Hidden Art’s select range and are cheekily called Jeeves and Wooster. The websites blurb states that the lights are “suitable for any aspiring gentleman or conscientious manservant where class and sophistication are the essential components to illumination.”
The Jeeves bowler hat is lined with a gold interior, whilst the Wooster top hat is lined with a silver interior. They’re also priced relatively cheaply for such unique pieces. Get it from Hidden Art.