EATON Wiring 604-SP 660-Watt 250-volt Medium Base Ceiling Receptacle Lamp Holder, Porcelain, White - Light Sockets - 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 - Light
White Porcelain Incandescent Lampholder by Leviton at Fleet Farm
Leviton 660 Wat Medium Base One-Piece Single Circuit Keyless Ceiling Mount Glazed Porcelain Incandescent Lampholder, White 9874 - The Home Depot
Porcelain Lamp Holder W/ Outlet And Pull Chain, Medium Base
Vintage Porcelain Lamp Holder E27 Fittings Ceramic Bulb Base Holder Portalamparas For DIY Ceiling Light Table Lamps|socket outlet|socket cap head screwssocket handheld - AliExpress
Leviton - White E-26 Porcelain Lamp Fixture Pre-Wired with Shoulder for Bulb Cage or Clamp
LH0088 Incandescent medium base porcelain lamp holder/socket
Leviton - E-26 Porcelain Keyless Lamp Holder with Screw Terminals
UltraPro Keyless Porcelain Lampholder, 2 Pack, Medium Base, Indoor Lighting, Mount on 3-1/4” or 4” Box, 250VAC/660W, UL Listed, White, 54600 - - Amazon.com
Eaton 660-Watt Porcelain Pull Chain Ceiling Socket, White in the Light Sockets department at Lowes.com
LH0742 E26/E27 medium base porcelain lamp holder/socket for outlet box mounting
Legrand 60-Watt Porcelain Pull Chain Ceiling Socket, White in the Light Sockets department at Lowes.com