interior plastic color change

If you want true correct Mopar interior finishes and colors, contact Mopaint @ 732-846-1044. The are in Highland Park, NJ. This is what they specialize in. They are not cheap but nor is a quality restoration. A pint of velvet texture interior paint for a 1970 Super Bee was $145 shipped but it leaves a finish that cannot be correctly duplicated with an other product. We have also used their spray can dyes on a blue 71 CUDA that looks very similar to the e-body above. The key is the prep.
Mopaints turned me on to the Bulldog products as the best cleaner, adhesion promoter on the market and their products work on rubber/plastic bumpers (later model cars) and as a flex agent. Their adhesion promoter can also be simply sprayed on for jambing/edging new panels without scuffing/sanding all the hard to get to edges. Check out the Bulldog products at www.bulldogsticks.com.
They can be purchased at www.autobodytoolmart.com out of Elgin, IL as well as other places. Good luck.