Arm rests for 74'?

I'm having a terrible time finding arm rests for my 74 Duster. I can find all sorts of arm rests for pre 72 but nothing beyond that, new or used. Is it possible to use the 72 style arm rests in a 74? whats the difference? I'd prefer new but will take a good set of used ones. I cracked the one on my driver door. I need black if anybody has a set laying around.