Newer Challenger buckets in a Duster?

Yeah, they'll fit with a little work.
Take a look at what one of our Inland Mopars club members did...essentially put a 1970 Cuda body on a 2012 Challenger R/T chassis and interior. And everything from the Challenger R/T works.
It's a beautiful car that usually goes overlooked at most shows because people think it's just a Gen 3 Hemi in an old car. They don't get down and look underneath at the suspension or even take a look at the complete 2012 interior.

A Very Special Hybrid - Hot Rod Network