I know nothing of this sort of thing, but I would think most any basic machine shop could thread that for you for cheap. There's one by me that I go to when I need a bushing pressed in/out for my car. $15+ for a mechanic to press the bushing or $5 for the small machine shop... And they do it on the spot in a few minutes. It also helps support a local business which is a huge plus in my opinion. I'd go there even if the price were the same or a couple $ more than the auto shop.

Unworthy1, got anything lugged for cheap that wouldn't weigh a ton and should fit a 54cm bike? The fork on my bike is the style in the OP except you can see the welds rather than it being smooth and I don't really care for it.