At least a couple times in the past, there have been postings of the original Traffic Cop Stop Signal shown below (photo from one of Jay's Accessory of the Day postings). Here's some links to past threads.
Am I just dreaming, or has there been a magazine article or ??? that has the plans to make one of these?
I believe Ken from the Pacific North West was working on reproducing this item a while back. Maybe he might chime in here.
I am sure Fun Projects could make a great repro of this, I would be glad to lend mine to John to reverse engineer it. I think it's a great whimsy item for ANY make antique car.
If you need a live model, I'm all in...