Best Buy: DJI Ronin-S Focus Motor CP.RN.00000022.01
DJI Ronin-S Part 3 Focus Wheel - Photospecialist
Amazon.com : DJI Ronin-SC Pro Combo - Camera Stabilizer 3-Axis Gimbal Handheld for Mirrorless Cameras up to 4.4 lbs / 2kg Payload for Sony Panasonic Lumix Nikon Canon with Focus Wheel, Black : Electronics