I am also sceptical.
This looks like announcement of discovery of holy family´s tomb. There were two or three such discoveries in last 30 years if I am not mistaken ...
I was doing some research on 31.7.44 recently. And some time ago I was in touch with Rippert, but not about this topic.
Since 70´s there is another candidate for killing of Saint-Ex. After extensive research, that person is realistic in time and place, but engagement on July 31 is otherwise more likely legend.
If Nick Beale could make overview of Jafü Süd operations of 31.7.1944, it would be great. I would be not surprised if there was simply no engagement.
BTW I also found The Last Flight movie some time ago. IMHO it is very good fiction movie.
Here with English subtitles:
http://www.youtube.com/watch?v=9WKK1RQoewM
Behind camera was Alex Thomson, an expert in his field.