To save filling up the WOS thread, I though I'd post my design of the watch/mic holder.
This is the mark 2 design. There is still plenty to improve, but it works well.
The parts:
12mm MDF board
Sticky back foam http://amzn.eu/2OJAKGS
Lapel Mic http://amzn.eu/5vx2I9Y
Camera ball mount http://amzn.eu/cXi9TWv (Borrowed from my camera)
Small spring http://amzn.eu/fmMyvMi
Screws & Glue etc
All that's missing is a mechanism to hold the wat