This is a modified top piece (SBU_F.Slot) to fit the M10 connectors. I have also added a bridge to allow for the filament to glide along with less friction over the handle pin.
You will need to download the wonderful MMU Slot Buffer by Martin_J. to use this mod.
https://www.prusaprinters.org/prints/30811-mmu-slot-buffer
UPDATE! I have improved the part to now include threads to make it easier to screw in the M10 fitting.
Print Settings
Printer brand:
Prusa
Printer:
i3 MK3 MMU 2
Rafts:
No
Supports:
No
Resolution:
0.2
Infill:
15%
Filament brand:
ANY
Filament color:
ANY
Filament material:
PLA
Notes:
Take extra care aligning M10 fitting and screw in slowly keeping the fitting perpendicular to the angle of the hole. Future updates will make this easier.
Use an M10 fitting that the PTFE tube passes directly through. Push the PTFE tube fully through the hole on the opposite side. This will eliminate most friction when the filament is being pulled.
The author hasn't provided the model origin yet.