This is the Bondtech extruder carriage from Caribou3D for Prusa MK3s/+. This would allowed you to replace the existing designed without adjusting the firmware. To me, this multiple pieces x-carrage is eaiser to be installed and helpful for the maintenance as well.
The existing Caribou3D x-carriage is slightly wider. The x-axis calibration will be failed if you do not adjust the firmware.
This remeshed x-carriage had been tested for few months. 100% working well.
Take note of that the bearing holders are designed based on MISUMI Linear Bearing LMU8.
The author hasn't provided the model origin yet.