This thread reminds me of one I saw a year or so ago on MonteCarloSS.com about why no ones reproduces rear windows and rear window seals for the 86-87 aerocoupes.
The logic behind why they were never reproduced was simple. 200 were made in 86 and another 6000 made in 87. That means there were 6,200 Monte Carlo SS aerocoupes ever in existence. Out of that number how many were wrecked, scrapped, or sitting in fields waiting for scrap to come up? Out of that new number how many people actually need those parts?
Obviously there are those of us that really do need them but no company is going to make money making these parts when there's such a small ceiling on how many could be sold to begin with.
Obviously there are way more wagons across the brands and the years but the same logic applies. It sucks for those of us with these cars but its understandable. The 3D printing would be a cool idea. You would definitely own the market lol