Available in 120mm, 150mm and 180mm.
I designed these to go with my Ender 3 S1 Go Pro Style Mount and Logitech Quickcam Pro Webcam Mount.
Both can be found here:
https://www.printables.com/model/220207-go-pro-style-mount-for-ender-s1-pro
https://www.printables.com/model/220209-go-pro-mount-for-logitech-quickcam-pro
The author hasn't provided the model origin yet.