As far as I know, the Italian AF Historical Archive is proceeding to a digitalization of all war diaries, but I don't think that they are available by this way yet. The usual way to get copy of them is to go to Rom and take digital pictures...at the very low rate of € 3,00 per diary.
Anyway, you may ask to the Office itself:
archiviostorico@aeronautica.difesa.it
ciao
Gianandrea