Rossano, I picked the car up from Fantasy Junction in Emeryville, CA. Here's a clip out of Wikipedia on production numbers. I believe many have not survived due to some, um, vulnerable fabrication techniques, lack of coatings, and electrolysis.
"The Sport was built by Zagato, and was also a two-seater. It used the same shorter wheelbase chassis as the GT, and had a very distinctive rounded aluminium body with pop-out handles. The Super Sport replaced the Sport in 1964, with the introduction of the 2.8 L 152 bhp (113 kW) engine. The first Sports had flush covered headlights, later changed to more classic round ones. The Super Sport also saw some changes - the rear was updated to a Kammback, while the front was made more aerodynamic with distinctive tear-shape headlight casings. Until 1967, 593 Sports and Super Sports were built (99 Preseries, 344 Sports, 150 Supersports)."