My understanding is that the Channel Bleriot is in the Musée des Arts et Métiers in Paris.. That does not mean that a Bleriot was not stored at Buc nor destroyed on 19 July 1940
http://www.arts-et-metiers.net/musee.php?P=89&id=36
Of course I do not know the history of where the Channel Bleriot was in the 1940's thought it was in the UK in the late 1930s'