If you go price Legendary Upholshtery, you will give up pretty fast.
But if you go over to
www.moparts.com or
www.ForAbodiesOnly.com
and look at the ads and ask around you can come up with all the parts
you need, ebay is also a possiblity, but I like the other two better.
I have a 1974 Duster and when I got it I had the dash stuff, but everything
else was stripped out of it. I bought the side window trim off moparts
and door panels out of local pick your parts or ecology center out here
in SOCAL.
I'll also send you a PM with the email address of a guy in KY who has
a number of Dusters he is parting out, I got some of my parts from him.