David, I don't know where the TOEs of the Bersaglieri battalions got but unfortunately in AS they were not so schematic and moreover they also varied a lot of those you reported that instead are the original ones from the beginning of the war. Moreover, especially the 8th regiment (that is, that of Aries changed its staff on the field several times on the basis of what was currently available on the field) .... however, to say that the battalion did not have pieces from its TOE 20mm anti-aircraft seems a bit risky .....
All the best
Maurizio