Outlet to Socket Adapter,Plug-in Light Socket,Convert Outlet to Light Bulb Socket,Polarized 2-Prong Outlet to E26 E27 Screw Base Bulb Socket, 660 Watt, 125 Volt, UL Listed (4-Pack) - Amazon.com
Leviton [8751403] Single Light Socket 2 Outlet Adapter - Brown - Lamp Sockets & Parts