Front Bench Seat for a 1973 Dodge Dart Sport

You can use find, a cheap electric carving knife and contact glue to repair foam cushions. I find that way best a low cost fixes. Cover with a layer of cotton.
That's how shops do it but thet use a wire cutter to shape foam.
Crazy as it seems now, in late 70s and 80s I was poor and just as creative as I am now.
I would take a tape measure to junkyard find a car with nice buckets in velour. And close in inches back seat.
But um cheap. Put just the cover on my cars rear seat and carpet the floor with left over plush carpet from work close in color.
Tint the windows matching color tint.
Looked like a high dollar 80s velour custom job.
My B5 1970 slant six Duster has medium blue velour guts done that way. Added a 833 4 Speed and pedals, hump from a Demon 340 But used I think a slant bell house from truck. So needed new carpet and buckets.
Plush house carpet was free since that was my job then.
And I was polishing aluminium back then too so had used refinished by me slot wheels on non radial BFG (belted) tires
I dig your Plaid seat material on pictures seats