I am almost certain they made 3, all specially ordered by that SoB (...that is Sultan of Brunei). He also ordered 3 456 4-door sedans as well as 3 456 convertibles. That could be the biggest special order Pininfarina and Ferrari ever took as thay are known to produce special one-offs from time to time for "very special customers'. E.g. I know they sent a Testarossa targa to Belgium back in the 80s.