Hi all Received my mavic fly more bundle about a week ago,  while I was waiting I had an ally tablet holder made at work. Used the DJI phone holder and ally post. You can mount the tablet over the controls (my fav) or have it mounted behind the controls. I wanted to incorporate a neck strap , one that didn't interfere with your thumbs in any way. Two pieces of Velcro later, the hard Velcro on the back of the phone holder and the soft Velcro with a camera strap quick release buckle sewn in between the two soft pieces. Proper job.

Hope this helps anyone wanting a neck strap that doesn't mount off the holder or cover the tablet in any way.

Will these be available to purchase ?

unfortunatly not but it does give you ideas of how to mount a strap if you like too.there are a few plastic tablet holders out there that use the original phone holder.
My ally holder was based on this design
http://www.thingiverse.com/thing:1816542