The pictures of this car came to light when Peter Andreina of Curbside Classic made contact with Peter Stevens, who gave them to him; this was the first time this design had been seen.
In the Curbside Classic article it says: "Peter Stevens is not sure whether this was created at the request of Renault/Alpine, or if Fiore was making a proactive effort based on the presence (and perhaps failure) of the A480."
That does not mean this is an A480 proposal, just that he got the job of designing this Alpine-Renault because of Fiore's work in designing the A480 and he wanted to further his connection with Alpine-Renault by coming up with other designs for them.
So I still haven't seen any definitive proof that this is an A480 design. Maybe Djetset has some or maybe I should ask him myself, as I have had some contact with him.