The Cuda a Challenger headliners are different I think. The Challengers headliner goes all the way down to the package tray area. I think the Cuda headliner stops up at the top of the back window and uses an extra trim panel to fill the gap.
Burdar, I bought a new headliner 2 years ago from the Paddock. They listed both types of material for a '73 including the ribbed/corduroy type you are looking for. $75.00 for either type. IMO, $279 for a headliner is ridiculous. I know businesses have to make money, but......
If you could find out who was supplying the Paddock before it closed it's doors, you might be successful in finding a source for the headliner you want.