Ah, the fun of a car that you can't disassemble. Only the doors trunk and hood are removable body parts. I did a 55 T-Bird that had been wrecked and poorly repaired and rusted out. It was welded across both front fenders and it took 2 trunk lids to make one.
Those panels and parts probably have OEM parts numbers or paperwork somewhere from an American manufacturer cause it's probably been years ago when those parts were ordered..That makes your find even better..