I emailed him to ask a few questions and one of the things he told me was this was one of a batch of hats Lucasfilms had ordered for Last Crusade, but never picked up.(as it's a 7 5/8, it must have been for someone other than HF) He also mentioned having been a collector of Indyania since right after Raiders. At one point he was connected with Lee Keppler. This got me thinking, so I went to IndyGear main. Checking the IndyGear story again and sure enough, mention was made of Steve Ferguson providing the initial info that HJ was the maker of the movie hats.
He says he has about 15 boxes to go through as he seems to be liquidating most of his collection. Wonder if there's an original Raiders fedora in there somewhere. I didn't take a before photo, but the fedora I got looked a lot like the one Havershaw took a few shots of:

And this after I used some of Dalexs ribbon dyed darker, and reshaped it in the Raiders fashion:

The felt is not the same as my other HJs. The brown is redder and the felt is noticibly thinner. Also the crown height is 5 1/2". Could this be because Ford's really was 5 1/2" and so even stand-ins and stuntmen had to have theirs the same?