Maxxima Plastic Lamp Holder, w/ Outlet and Pull Chain One-Piece Medium Base, E26 Outlet Box Mount, 660W (2-Pack) - Walmart.com
Leviton Keyless Lamp holder, White
LH0744 E26/E27 medium base lamp holder/socket for outlet box mounting with pull chain and receptacle
oviitech 2 Outlet Light Socket to Plug Adapter, Electrical Screw in Light Bulb Socket Outlet Adapter, Lamp Holder, Dual Polarized E26 ETL, White (3PACK) - Amazon.com
Remote Control Light Bulb Fixture Socket with Timer, PBT Plastic Ceiling Lamp Holder with 2 Grounded Outlet, 125V 660W Light Fixture with Outlet for Garage, Basement, Mount on 3-1/4'' or 4'' Box -
Onite UL Listed E26 to 2 Outlet Socket Adapter, Light Socket to Plug Adapter, Light Holder Splitter, with Pull Chain (5.11inch) Switch, 2-Pack - Amazon.com
Leviton One Piece Pull Chain Side Wired Outlet Box Lampholder - B01-09716-00C | Blain's Farm & Fleet