Hi
Came across this and even though it is an old thread I am compelled to respond as the company I work for has a patented EFB mount that will fit any airframe type. It is DO160F tested to 20 g's and flying in A320 and other aircrafts. Can visit
www.asginc.net - Avionics Support Group, Inc. - Miami, FL to see it.
I know the approved mounting solutions are hard to find. Hope this helps..