But what if replacement panels aren't available, as in antique cars? To make a long story short, a friend of mine has a 20 something Chrysler where only 20 were built. He was missing some major parts, and traveled all the way to PA to buy a pile of parts at an estate auction. He thought the pile would go for around $15k, but ended up being sold around $70k.
Luckily, the guy that bought the pile was from IL, so they swapped parts temporarily to have parts made. A windshield frame and trunk were two things I remember him having made, using the other guys' parts. The other guy had a front fender made using my friends' fender at a model. I'd have liked to watch the guy making the fender...that would be one work of art by an artist.