Didn't the Italian Navy have 7 battleships (not counting the incomplete Impero)?
Cavour Class
Conte de Cavour - Sunk in Taranto air raid - scrapped port-war.
Giulio Cesare - transferred to USSR post-war - sunk by mine.
Doria Class
Andrea Doria - Scrapped 1957
Caio Duilio - Scrapped 1957.
Littorio Class
Littorio - Scrapped 1948.
Vittorio Vineto - Scrapped 1948.
Roma - Sunk by German glider rocket 1943.
Impero - Not completed, hull captured by Germans.
We do need more Italian warships (cruisers and destroyers too), and I am sure we will see some after everything is worked out with Sansal's tool. I think that it is important that we do not rush those who are working on this - I'm sure they know what they're doing.
In the meantime though, we can put out some suggestions.