E26/E27 to E39/E40 Light Sockets Adapter, Light Bulb Socket, Bulb Base Adapter, Converters Lamp Holder, Converts E39 Pin Base Fixture to E26/E27 Standard Screw-in Socket (Pack of 10)
ES Light Bulb Socket E27 to E40 LED Base Screw Lamp Bulb Adapter Converter White - - Amazon.com
Porcelain Lamp Holder E40 Ceramic Lampholder with Wholesale Price - China Lamp Base and Lamp Socket
E27 to E40 Light Adapter Lamp Holder E40 to E27 Lighting Bases Parts | eBay