I talked to this owner. Seems like a great guy. He claims that Courtesy Ford in Denver produced these with an aftermarket half cab and special paint job from the factory. The data plate did not show a paint code, which kind of corroborated his story, in my mind. And it does have a Courtesy Ford plate on the back, and says Courtesy Ford on the side stickers.
It had some rust repairs that weren't as clean as I thought they should be, and (personal preference) I didn't care for the paint scheme. And it would be a shame to paint over it if it is something someone else would value. FYI - the giant picture of elk on the hood is apparently a magnet, which was a bit of a relief. PM me with your email address if you want more photos and I'll fish them out of my email for you.