Recommendation , Seats for a 124cc Coup

[JDistef]

Hi Everyone,
I have a 1974 124cc Coupe. Am thinking about replacing the original front seats, that I find very uncomfortable. My weight doesn't help the situation.
Can anyone suggest something that will fit easily with some slight mods? Can't afford a set of new Recaro's or equivalent.
I may have seen a car once that had Alfa 156 seats.
Thanks