UPDATE BL Touch mount option added. Please select the Extruder Cover and Extruder Body whilst downloading STL
ZOrbiter extruder derived from Prusa R6 extruder and fully compatible with Zaribo, Original Prusa and Bear Mods. It weighs 380~ grams which may give you room for more speed. And also, it does not compromise power with its 9.4kg filament pushing force while being ultra silent. Below you can find the links to a full kit, plastic parts only and motor only. Firmwares are available at Zaribo Downloads.
Links:
Printed Parts and Misumi Black Screw Kit
Orbiter Geared Extruder Motor (Dupont cable should be selected for Einsy Rambo Boards)
Build Instructions:
https://zaribo.com/blog/zorbiter-extruder-for-zaribo-prusa-bear-mk3-series/
The author hasn't provided the model origin yet.