Is that Mangusta Protoype no. 1 bodied by the factory

I looked on Google for pictures of the Mangusta no. 1 and saw
the gold car with

- the full width non-movable sunroof
-blacked out nameplate on side
-deep dish gold wheels
-custom made taillights

That reminded me that a few years ago, I saw pictures of it as a running car in Italian Car maazine (from England) where some reporter tookit for a ride. Yet when I saw the car in Italy it had a mock up dashboard, no drivetrain, but that was 30 years ago. So my question is: did the factory put that prototype body on a production Mangusta chassis to sell it? Or did some outside buyer first buy the body and then go ahead put it on a chassis himself?
When I heard of the factory prototypes being sold later on when they went bankrupt I think the Mangusta prototype was already gone from the list. I dont think the car has shown up at the Villa d' Este, the premium concours in Europe.
Does anyone know how it got to be a running car?

 

It was dark brown. It had Dino style caramel colored leather seats
that seemed short (about as tall as XKE series I seats). The driver
that day I saw it was a movie star named Dino Martin, who was waiting at a
body shop to get an estimate bcause he had crashed it hard head on.
He later died when he had a head on crash with a mountain in a fighter jet.
I think later I saw pictures of a dark brown glass top mangusta in the two Mangusta collection of a fellow who lived on the coast south of Newport Beach, maybe Solana Beach. He bought the car damaged and I don't know if it was fixed. The second glass roof car was the red one owned by Don Vordermann the editor of Automobile Quarterly whose car also had the deeper dish wheels, and the blacked out chrome lettering. Incidentally Mr. Amory Haskell, the brother of Mrs. DeTomaso, had a Mangusta with rectangular exhausts and glass roof that was on the cover of Sports Car Graphic. I remembered it because it had personalized license plates and back in those days I didn't think you could get them but the Haskells were high society and knew people who knew people, etc.
I am surprised the DeTomaso family still owns the prototypes--all I know about the family since the sale fo the company is that some prototypes were sold and Mrs. Haskell appears as a competitor with her dog at the NY Kennel Club show.