Update 22.02.2015:
Test flight video added.
http://youtu.be/4lyIlt7PwZo
Some shakiness, but I think this comes from a badly adjusted gimbal rather than actual vibrations, due to the nature of the vibrations.

The original design with the forward facing anti-vibration balls tended to bounce in strong winds.. this is an attempt to increase stability by using the balls in the way they are intended, under pressure from above.
Note that I was not able to actually test it in flight yet.
Photos show the first prototype, I made some small changes to slim down the motor mount plate and rotate the motor by 90° since, but didn't bother to print it again yet.
All except for the plate and mount are identical to my previous design and can simply be used again.

The Gimbal Mount file has the rubber ball holes closed on purpose to allow printing a smaller hole on top of a bigger one. The closed area will only be a single layer thick, cut/drill open and file or sand the edges a litte bit.

Loosely based on http://www.thingiverse.com/thing:688504, although by far not as pretty.