I have a 72 chevelle Malibu and recently ordered new seat covers for it. When they came the back bench was the right cover, but i noticed there was something different with the front seats. The front seats on mine are different from the new 72 chevelle seat covers, also the ones it came with have a center armrest. Are there any chevelle malibus that came with different seat covers with a center armrest? If so where can i buy a cover for a center armrest?