The only headliner that I am aware of that is available for 70-76 DartDemon, Dart Sport and Duster models is made of gray plastic. It is shipped in an 18"x18"x60" box after rolling it like a tube. They are to be removed from the box immediately after recieving, and left to lie flat so as to NOT take a set to the tubular form. The F O U R that I have bought fit great and looked pretty good, despite not being totally factory correct. ZERO foam backing on the ones that I bought. It may have been available, I dont remember that part. I put sound deadener above the one I put in my FrankenDuster.
Good Luck.