Amazon.com: UltraPro Porcelain Light Socket with Outlet and Pull Chain Light Fixture, Light Bulb Socket, Medium Base, Grounded Plug, Indoor Lighting, Mount on 3-1/4€ or 4€ Box, UL Listed, White, 18305,1-Pack :
Plastic Pull Chain Socket With Shade Ring (47682) - Antique Lamp Supply - Quality Lamp Parts Since 1952
Screw Base Light Bulb Socket w/ Pull Chain Switch Converter Outlets to 2 --us | eBay
On-Off Pull Chain Leviton Lamp Socket w/UNO Thread - CHOICE of Socket Finish (40108) - Antique Lamp Supply - Quality Lamp Parts Since 1952
Black Light Bulb Socket to AC Outlet and Plugin Adapter with Pull Chain E26 LED | eBay
Brass Lamp Sockets, Side Mount - Paxton Hardware
Royal Designs, Inc. Pull Chain Lamp Socket for Incandescent LED Bulbs, Antique Brass, Set of 2 - Walmart.com