I have seen it fitted to an Uno. As you'd expect, it's not a FIAT part and is made by Lester. They are Carello headlamps and probably hard to find now. I don't know what other models might have used them! Maserati BiTurbo?
I had a set of those on my Horman Uno Turbo. They were crap. I sold them to a kid with a Vauxhall Nova and fitted a set or original headlights with ultrabright H4's.
Prima Racing had a headlight conversion in stock about a year ago and Essex Racing had the molds last I heard.