Need help with my 1974 Plymouth Duster...Dash Cluster?

Build your own, there are any number of companies selling gages, Mopar, Autometer,Sun, etc. Decide what gages you need/want and build your own dash bezel from plexiglas or other lightweight material, include the radio/heat too. Paint the dash the color you desire after fitting your gages and cutting openings, of course if you want original you'll have to look like others said.