Yeah locomotion the correct one for a challenger is the the pic you posted from ebay. they where all the same style 70-74 except for the buttons being chrome on all 70 and on some 71, but all 72-74 had black as cudaized pointed out.
cudaized- it for my buddys car been try to get him on the site but at the moment im doing some foot work for him. He has a 72 but he dosent care at the moment what year its from as long as it fits.
I have a spare 70 for my car but the only problem is it has no face or knobs so its somewhat usless except as a spare.. but it works great..