Eaton 4-in L x 12.25-in Dia Traditional Plastic Lamp Cage in the Lamp Parts department at Lowes.com
Metal Light Bulb Cage | Industrial-Chic Light Bulb Cages
Pendent Light Bulb Cage Innovative Iron Art Lampshade Not Included Bulb Industrial Retro Nostalgic Innovative For Aisle Corridor|Lamp Covers & Shades| - AliExpress
Black Bulb Guard Clamp on Lamp Cage for Vintage Trouble - Etsy
heavy duty late 1930's american industrial reinforced galvanized steel machine shop pendant light bulb cage or guard with reflector and hook