Early A Body Buckets and Brackets
Those early A seat tracks had risers bolted on with square head nuts and bolts. The bolt holes in the tracks had slots and the risers had notches which would allow all sorts of adjustments. I have those tracks in good condition but I dont have the riser portions. I'm guessing those were rusted away at the floor pan. If the uppers alone will help, 40 plus shipping from 29642.
I also have one steel seat back. It came from a deluxe interior car so it has a carpeted toe kick at the bottom. The vynil skin on it is very nice. I may have one extra side shield too ( I'd have to look ).
Good luck with your search. Let me know if any of this will help.