Tim,
I think this might be the original source for the first Firefly Ic pic you posted.
https://audiovis.nac.gov.pl/obraz/225038:1/
A Polish Firefly. According to the description the picture was taken in Italy and the unit is 2 Independent Armoured Brigade, 4 Armoured Regiment "Scorpion".
The same archive also has some close ups, from what I presume is another one of the ARV cupola's.
Alex