Vintage Off/On Pull Chain Lamp Socket with Solid Metal Cast Shell, E26 Medium Base - royalLAMPSHADES
Eaton Plastic Pull Chain Ceiling Socket, White in the Light Sockets department at Lowes.com
LED Ceiling Lampholder with Pull Chain, 10W Bulb and Bulb Guard, 9852- – Leviton
Leviton Plastic Pull-Chain Lampholder R50-08827-CW4 - The Home Depot
Eaton Wiring 660W Ceiling Lamp Holder, Medium Base, Porcelain, Pull Chain, White (Eaton Wiring 659SP) | HomElectrical.com
RXEAZIL UL Listed E26 Lamp Socket Replacement with Pull Chain Switch, Phenolic Threaded Medium Base Light Socket with Lamp Shade Ring for Table, Floor Lamp Repair Kit - - Amazon.com
Leviton R50-08827-CW4 1-Piece Top Wired Lamp Holder with Pull Chain, 660 W, Incandescent/Fluorescent/CFL, Medium,White - Light Sockets - Amazon.com