This might be a valuable resource for P-51 researchers. (I don't know if it's widely known or not.)
http://aviation-safety.net/wikibase/...php?AcType=P51
You can also search the database by day and year. Example: There were a lot of Douglas C-47's lost on June 6 and 7 in 1944.
It is not a complete database, but it might be a valuable start.
Bronc