The Symfonisk lamps can be used with a majority of Ikea lamp shades. : r/sonos
Ikea SYMFONISK Lamp Shade Adapter by galvanization | Download free STL model | Printables.com
HOW TO CONVERT AN IKEA JARA DRUM PENDANT SHADE TO FIT A LAMP BASE | Dimples and Tangles
I Like That Lamp Wire Lamp Shade Rings with European Fitter (8” Diameter), Includes 2 Galvanized Steel Silver Drum Rings, Make DIY Table/Floor/Pendant Lamps, Compatible with most IKEA & Target Lamps - -
How To Fit Ikea Shades Onto Non-Ikea Lamps (And Fix Other Crooked Shades!) - Shine Your Light