I went to Legendary interiors website, and for a GM A body 68-72, they only show Chevelle, Malibu, and SS as an option to pick from.
http://www.legendaryautointeriors.com/catalog/products.html?make=CHEVROLET (A-BODY 68-72)&model=CHEVELLE/MALIBU/SS (68-72)&year=1972&nav_cat=UPHOLSTERY %26 TRIM ACCESSORIES&class=SEAT UPHOLSTERY-CHEVROLET
Is that the correct website? I didn't think the Chevelle interior was the same as the Monte Carlo.