duster hood sccops

Does anyone have any information on the hood scoops that were offered on the 73 Duster's. I have seen a picture from a brochure of some sort and the 340 equipped cars had a 1969 Barracuda 440 sort of scoops. Which are the small ones on each side of the hood up by the windshield. I have never seen a car with these on it before. Does anyone know if it was an actual option? I thought it would be cool to have them on my 74 Duster. If I could find them cheap however. Thanks