BBC documentary

I'm currently producing a documentary on Road Movies for the BBC in the uk. We start filming in Rapid City South Dakota 1st Sept and finish filming in Livingston Montana on 12th Sept. I'm looking for a muscle car for our presenter Rich Hall to drive and use in the filming. Ideally i am looking for either Plymouth duster, Plymouth Road Runner, or Plymouth Baracuda. The car needs to be a convertible. Would anyone be able to help or point me in the right direction. Many thanks. Really appreciate it.