Canopy top for pickup bed

[4port]

I recall seeing some plans for a pickup bed canopy top in the past, but can't locate it. I believe this included working drawings for the brackets. I think I could cut the brackets on a water jet out of 16ga or 18ga steel and bend them.
Here is a photo from the DeAngelis book " The Ford Model A as Henry Built it". The Restorer index has a listing in 1971, but I don't have that issue in my collection.