There is a similar set of Carello fog lights in the classified section now. Not identical to your broken lens set but similar, for reasonable money.
I have a pair of used, but excellent rectangular fog lights, circa late 70's early 80's, clear lenses, no bulbs, can be installed upright or hanging, no rust on hardware, glass is good, but fine blasting of lenses from road debris is present. Asking $200.00 plus shipping. Fran