Amazon.com : Inkesky 7/8/9 Speed Bike Rear Derailleur - Direct Mount(NOT Hanger Mount) - Long Cage(SGS) - Compatible with Shimano for Mountain Bike, MTB Cycling : Sports & Outdoors
There's a flood of Direct Mount derailleur hangers at the Tour de France — but why? - CyclingTips
Specialized Disc Brake Direct Mount Derailleur Hanger - Framesandgear