I have a set of two ECUs from a 1995 Quattroporte 2,8 24v. I believe they are the same. They are in my basement in Oslo. I can send it to you. Asking 300 euro.
I also have the engine, which is completly rebuilt by a Maserati professional here in Oslo. Asking 5000 euro. Rebuild cost was around 8.000 euro... Perfect if your timing belt brakes as did to this one, ir you want to put in a more modern engine into an older Biturbo. Ir even for a project car.
Erik Eriksen