are you looking for full width seats, like for the back? the Deco cab was narrower so the seats would be too, and their seats were a bottom and back that mounted on fixed parts of the cab, not "a" seat really, and no "brackets" as in the TF series, so you'd need to fabricate a lot, including adjusters - better to look for TF seats or something modern, like late 80's GM truck .... OTOH, the Deco panel seats were like the buckets you picture and the Deco front burb seat might work, even if narrower
Bill