I don't know if they still do, or when they started doing it, but at least in the 2008/2009 era when I was in the market for a new Challenger, if a customer ordered a Chrysler product, the window sticker said "Ordered especially for John Doe" up at the top. A nice little perk for someone getting a new car, having a window sticker for your car with your name on it saying the car was built for you.
I'm guessing they never did anything like that back in the '60s and '70s.
I didn't get to order my Challenger and bought one in stock instead, so I didn't get my name on the sticker. But at least I got a sticker. When I bought my Dart in 2014, I went back to the service area to take possession of my new car, where the techs had been doing a quick prep of it, and no sign of the sticker and everyone just shrugged when I asked about it. I have a pdf of it I'd saved off the dealer's website but it would have been nice to have the real deal.
I know some people consider repro window stickers on vintage cars to be "fake" and wrong, but I have a friend who has a '71 Challenger and displays a window sticker in the window at shows and cruises, and I have noticed how lots of spectators at these events really get a kick out of checking out the sticker and seeing the price of the car and the options when it was new! They really do add interest to a car being displayed and I don't see anything wrong about that.