Hidden Valley Original Ranch Restaurant Style Dressing Recipe Mix, 0.4 Ounce (Package May Vary)

Where would one get the type for the salad? Or can i use the same sour cream ranch mix and use buttermilk/mayo instead? EDIT - nvm I found it: https://www.amazon.com/Hidden-Valley-Dressing-Original-Buttermilk/dp/B000SR5MM6