Leviton 8101 Porcelain Incandescent Medium Base Keyless Socket
3352-F : Leviton One-Piece, Keyless, Phenolic, Medium Base Socket | AMRE Supply
Leviton 30 Incandescent Lampholder, Medium Base, Two Piece Porcelain; 660W-600V; Keyless; with Two 8-32 by 1/2 Inch Long Mounting Screws., Light Sockets - Amazon Canada