8 Pieces Lamp Shade Ring Collar Lamp Ring for Shade, Replacement Adapter Ring, Retainer Ring for E26 Light Socket with Diameter 1-1/2 Inches (39 Mm) for Lamp Holder Fixture (Black, White): Amazon.com:
OZXNO 1-3/8 Inch Lamp Shade Collar Rings 2pcs E26 Light Socket Rings Retainer Rings and Replacement Adapter(Black) - - Amazon.com
Shade Ready Socket Extended Threads - Black
Light Socket Shade Ring, Metal Lamp Shade Collar Rings for Medium-Base Ceramic Sockets,Light Fixture Parts of Retainer Rings,Lock E26 E27 Socket with Thread Diameter 1-1/2 Inches
Lamp Shade Ring E27 Light Socket DIY Ring Lamp Shade Iron Wire Light Cover| | - AliExpress
Light Socket Shade Rings,Aluminum Threaded Socket Ring for Medium Base E26 Sockets,Retaining Rings for Glass Lamp Shades/Light Fixtures (4-Pack White Color/For Thread Diameter 1-1/2 Inches)