As an alternative, my S2 Coupe when it came from Italy in 1982 had Cibie foglights fitted with H1 bulbs (see below), not quite the same as the Carello model, they also have a smaller modern version available also being rectangular.
Thanks for the update and picture, but I will stick to my NOS round Carello's for now unless I find the correct Montecarlo's at some point the the probably distant future (they kind of look cuter too!).
FF