Seems like those wire cages might be similar to the ones that cover the light bulbs that you can hang from the hood of a car when you need extra light to fix stuff. but I did find these : https://www.walmart.com/ip/Metal-Lamp-Guard-Black-Replacement-Bulb-Cage-PLT-MC200/184586937?wmlspartner=wlpa&selectedSellerId=276&adid=22222222227045042396&wmlspartner=wmtlabs&wl0=&wl1=g&wl2=c&wl3=94104672890&wl4=pla-216388803170&wl5=9027595&wl6=&wl7=&wl8=&wl9=pla&wl10=111838727&wl11=online&wl12=184586937&wl13=&veh=sem