Rear defogger for 67 Fastback ideas?

[fordsbyjay]

I seem to remember a car from the '70s that used a little fan set up under the parcel tray that blew air onto the back window. I want to say it was some kind of Japanese import but can't for sure recall. Maybe it warrants walk about at the wreckers.

That was my initial thinking as well. Any fan will circulate the warm air from the front and defrost the window. You just need to figure out how to hide it.