Geared Bowden Extruder Mount for Prusa i3
This is the mount I generated to install http://www.thingiverse.com/thing:60531 onto a Prusa i3. It attaches at the upper Z axis smooth rod holders.
It works with both right and left (just flip it) with no interference with the frame.
A video of the mounts in use can be found here - https://www.youtube.com/watch?v=n2r9XqPwZHA&feature=youtu.be