Is the headlight assembly of a 1991 Audi 80 series interchangable with a 1990 Audi 100 series?

I need to replace my whole front bumber, headlight assembly, and possible the hood. Is the headlight assembly of a 1991 Audi 80 series interchangable with a 1990 Audi 100 series?if you are changing all those panels then very good chance you could make them fit using h/light mounts from donor car.