I modified the original X-Carriage and Extruder Mount from scott_3d. I do not like the fact that the x-axis endstops are part of the tool, and not the machine.
The carriage should be compatible with 'older' mount. I just extended the carriage out ~6mm to accommodate for the endstops.
I never printed it myself, as I moved to sensorless homing.
Feel free to comment...