I would agree - there is NO chance of a commercial in-depth sim for any aircraft that is not in the front-line of public conciousness. The DCS a-10 will be the closest...
Meanwhile has anyone tried the add-on Phantom cockpit for FF5 by Aeyes?
It looks very comprehensive, and I think that with a bit of effort a very passable Phantom environment could be created within FF5.
There are additional appropriate theatres available and we can all create appropriate missions.
Edit: Look at this FF5 manual
there are several pages on the Phantom cockpit, including a Ramp Start procedure
PS FF5 does NOT require a Falcon 4 CD, no matter what the website may say.