there were 3 different styles in that span of years 70-71 72-73 and 74 later.
I have a set of blue plastic with black belts for 72-73 for a bucket seat car.
I believe I have some from a '74 or '75 bench seat A-body. I can email pics when I find them if you PM your email address. (I'm at work right now.) I'm live in the Daytona area.