ABCmopars for rebuilt dashes. If they have cores you could buy, but if not, will need to send your core. JustDashes used to be the best option some years ago, but they increased their prices rates a lot ( $600-700 ), then ABCMopars, Carolina Dashes and some other become on the best option on $400-450 rate ( some sellers use the same rebuilding service... they have changed their name several times. They use to come from El Paso, Texas )
Becarefull of sellers offering fiber cores... has been told they don't fit correctly, and are "wavy"
About plastic interior parts. BECAREFULL... there are couple of manufacturers making full interior plastic parts. One is worst than the other... Palco ( DashTop ) average quality for just driver cars replacement and Accuform, a full piece of ****. Don't ask how I know it.
As mentioned it has been told Tony is making nice A pillars ( which were available just by AccuShit ). But can't tell personally the quality. Classic Industries is also selling quite perfect repros of the seat back panels, but this is just because by casuality we are taking the ride from the E body crowd which uses same seat back panels and they are getting better parts than us. They are also molded in color, not painted like the rest of reproducers ( Palco/Dashtops makes just black and white... others will need to be painted ).