AMD MAY still be making A Body sheet metal

He may be wrong about the cost of production, but he's not wrong about the quality. I have first hand experience multiple times with AMD's ill fitting quarters. Nothing's gonna fir every car perfect, but holy CRAP what an experience. Like with FOUR different cars.
It’s not an easy task to produce the tooling and short run (very few parts, less than a couple thousand) tooling has to be cost effective and will always be less than perfect. Metal stamping is a nitch industry these day’s, really good die makers are hard to come by and the pay is not great.

Back in the day before plastics and composites, when stamped metal parts were everywhere, there was a big employee pool of highly skilled die makers. Now its getting to be a lost art like hand forging.