You can add me to the list of people interested in buying this setup, only demand is that you make one capable of supporting an Epic camera, don't think motors big enough exist yet though!!
Ok So here it is!! The Brushless Conversion kit (unofficial naturally) for the Freefly 2/3 Axis Gimbal. Shapeways will 3D print and send you the kit from my designs that I have used on my Gimbal. The video of it and pics are on the product page. Anyway as I personally have not used Shapeways but heard and seen good things about it thought this would be the best way to go. The accuracy with the default material should be spot on, if not please let me know and I will have to make ammends even though the .stl file is tested correct on my gimbal. Anyway you will need various additional bits and bobs to complete the kit and this is all on the product page. The price is only for the mounting kit and only for the Freefly Gimbal.