65 Fury seat differences

I have a 65 Fury 3, 2 door hard top. The seats aren't original , I have no idea what the are out of. The rear seat sticks up a couple inches above the package tray and looks crappy. I have noticed Sport Furys have a funky rear seat back that dips down, and the package tray cascades down behind it to provide a bucket seat effect.
What other seats fit a 65 Fury? I'm guessing a B body seat more that a C body seat. I'm hoping somone knows offhand.
Author: 65Fury440