Leviton 9880 Medium Base, Two-Piece, Keyless, Incandescent, Unglazed Porcelain Lampholder, Surface Mount Low, Single Circuit, Back Wired, White Pack of 1 - Medium Light Socket - Amazon.com
Leviton 600-Watt 250-Volt White Outlet Box Lampholder R50-49875-000 - The Home Depot
E26 E27 Ceramic Light Socket, Helunsi Medium Base Porcelain Lamp Holder, Ceramic Light Bulb Socket with 12" Wire Lead, Medium Base Lampholder for Incandescent Led Light Bulbs Replacement (Pack of 4) -
Leviton 660W Medium Base One-Piece Single Circuit Outlet Box Mount Glazed Porcelain Incandescent Lampholder, White 9726-C2 - The Home Depot
S14d white lampholder to purchase here | zangra
G9 Base Ceramic Lamp Holder Socket, M10 Entry Base | Mullan Lighting