The first PN that popped up on YearOne.com is 818700011 for a "Classic Dash" replacement dash panel without gauges. I did a web search for just the part number it showed up on SummitRacing.com as "Classic Thunder Road 818700011". The web search also found a link to an eBay ad that mentioned "Classic Dash" and had the following pic:
View attachment 1714747332
The eBay ad indicates the "carbon fiber" dash panel is actually "carbon-fiber looking plastic". Here's a link to the eBay ad:
http://www.ebay.com/itm/70-76-Mopar...-Cut-Out-for-Aftermarket-Gagues-/331223379814