I don't think you're giving the police wheels and caps a fair shake with that picture. Looks like the police wheels could use some refinishing, and running the caps really changes the appearance. Or even just running a small chrome cap to cover the grease cap and using some chrome lugs.
Another option is the Chrysler Road Wheel centers on the police rims- with a gunmetal grey or argent paint job they look just like the Super Coupe wheels.
and even better with trim rings added.
To give you an idea, here they are on a purple Aspen: