Managed to break the origional stepper motor mount on the Y-axis by running my printer at 6k accel for quite a couple of months. So therefore I designed a more robust version as a replacement, includng a new fitting endstop mount. 

Print instructions:

• 4 peremiters;
• 6 top and bottom walls;
• 35% infill;
• minimal supports underneeth the overhang, as shown in the picture, the rest of the model is designed to print without supports. 

Material:

Print in preferibly in ABS, ASA or Nylon, as the model will constantly be near the heat bed. PETG would problably work in a pinch but I wouldn't use it long term.

Attaching:

• All screws used for holding the stepper motor are m3*10 din 912;
• For attaching the two models I used an m3 bolt and heatset insert. But using an plastic screw or oversized bolt, would both work fine as well;
• The Y-axis end stop will srew in using the origional plastic screws;
• Holding the assembly to the frame can be done using the origional screws that go into the extrusions on the back.