Closest thing I can think of is an old Mercedes 300sl, but it’s probably just fake for the movie, not an actual production vehicle.

That will be an American mid 1950’s concept car/ show car, but I cant find which one. Definitely not a production car

Eidt - found it! The Ford Cougar 406, originally devised in 1954, but then went on to have a second life as a movie car as per this article in 1962

And it is available as a 1:43 diecast model too