My dear Maveric,
as all those projects were never built available details are very scant.
The following is what I found.
1 May 1938 requirement for a shipborne reconnaissance seaplane for Littorio class battleships. Required specs were: empty weight no more than 4,800 kg, max speed at least 350 km/h at 1,000 m, cruise speed 250 km/h, range 2,500 km.
CAB Ca.332:
Two-man crew
Two unspecified radial engines
Dimensions: fuselage lenght 11.485 m; lenght overall about 16.5 m; height 5.35 m
Armament: two forward firing 12.7 mm machine guns and one each in dorsal and ventral turret
CAB Ca.333:
Two-man crew
(perhaps) Two Isota-Fraschini Delta RC.40, inverted V engines, rated at 770 HP
Dimensions: same as Ca.332
Armament: same as Ca.332.
Piaggio P.109:
Two Piaggio P.VII C.16 rated at 470 HP
Piaggio P.113:
Perhaps three-seat crew
One Piaggio P.XI RC.15
2 January 1939 requirement
CAB Ca.345:
Two-man crew
Two Piaggio P.VII C.16 rated at 460-470 HP at 1,600 m
Fuel tank 800 litres
Dimensions: span 15.900 m; lenght overall 12.300 m; height 4.000 m; wing area 34.5 sq m
Max speed 345 km/h at 2,200 m; range 3,000 km at 214 km/h cruise speed
Armament: perhaps one-two forward firing 12,7 mm machine-gun and one 7.7 mm in dorsal position
CAB Ca.345bis:
Two-man crew
Two Isotta-Fraschini Gamma RC.35 rated at 520 HP at 4,000 m
Dimensions: same as Ca.345
Max speed 415 km/h at 4,100 m; range 2,375 km at 216 km/h cruise speed.
Armament: same as Ca.345.
Piaggio P.117:
Three-man crew
Two Piaggio P.XI RC.40
Approx span 13.9 m; approx overall lenght 13.5 m
Armament: at least one ventral rear-firing 7.7 machine gun
IMAM Ro.65:
Perhaps twin-boom design
Two Isotta-Fraschini Gamma RC.35
1939 requirement for a lighter seaplane, intended for light cruisers of Condottieri class
CMASA SN.16:
Designed by Eng. Manlio Stiavelli and his staff.
Piaggio P.120:
Two-man crew
One Piaggio P.XVI RC.35 rated at 650 HP
Dimensions: span 12.000 m; overall lenght 10.150 m; fuselage lenght 8,000 m
Armament: one 12.7 Breda machine gun in nose and one 7.7-mm Lewis in dorsal position.
1 July 1939 and 1 april 1940 contests:
Direzione Costruzioni (gen. Fiore - I think his first name was Amedeo) DC.10:
Two-man crew
Two Isotta-Fraschini engines
Dimensions: lenght overall 11.500 m; height 3.800 m
Armament: at least one forward-firing 12.7 mm and one in dorsal position.
IMAM Ro.65:
Perhaps tha same version already offered for the previous contest.
IMAM Ro.69:
I failed to find any indication on the books of the series "Dimensione Cielo".
Piaggio P.124:
Two man crew
Isotta-Fraschini Gamma RC.11/5
Armament: one forward-firing 12.7 mm and one dorsal 7.7 mm Breda machine-gun