Finally! http://shpws.me/TcWA
This is the Garmin Varia seat post mount for the Pinarello Dogma F (without the number). It took a while but it is finally available.

And, here is my first RCT715 Seat Post Mount Adapter, http://shpws.me/TcYx
It is specifically for the Pinarello Dogma F and provides a secure mount that is not the bulky rubber spacers and O-rings that Garmin provides in the box.