The hanger items shown in the first two pictures look line the ones on my 66 289HP. As I had a few usable original parts, I ordered the "concourse grade" parts I was missing. As a result, I can compare originals to what I received.
The bracket that attaches to the frame rail was "close". The ordered part was "close" to the original in the material thickness, design and the forming process. It was "poor" in the straight edge where the insulator attaches.
The insulators were very accurate when compared to the one original I have - except the rubber where the Ford part number is in raised letters on one was on the opposite side. I don't know if that is normal on not. The FOMOCO label was as shown in the picture.
The "U" bracket was another "close", my original has a rectangular "key" slot for alignment to a tab welded on the exhaust pipe, all the other dimensions were within manufacturing tolerances (my opinion).
When I get my kitchen remodeling project done, I'll take pictures. As of this time, I like the repro "concourse grade" parts I got. I am not prepared to reveal the source at this time in a post. If you are interested in the "where", send a PM.
Jim