Front Seats with head rests....Bench or bucket for early A?

on my 66 dart 270 sedan, it has the original Bench seats. I am trying to get it set up for safety for my son. I am working on a 3pt seatbelt, and I would also feel more comfortable with a seat with a headrest, so you dont break your neck. Is there a later model that used a bench with headrests? That might swap right into my car? Or is there a bucket seat option that would swap in easy?

Any help is greatly appreciated. thanks in advance.
pictures would help if you have any.