Rhode Island used to be the epicenter of the US jewelry manufacturing industry, and in the R.I./CT./MA. area, there were at one time hundreds of factories with rows of fly presses in them.
So in the northeast, there are still a few used fly presses kicking around.
But in most of the rest of the USA, there never were many, and most have been scrapped by industry 20 to 50 years ago.
So many blacksmiths are buying new ones, which are coming from India. I doubt they are as good as the old British and American ones, but I know several blacksmiths who have bought them, and are using the heck out of them.
Grant Sarver, of Off Center tools, who produces interesting and popular blacksmith tools (he has sold something like 30,000 pairs of tongs in the last 10 years or so) makes most of his output on a 100 ton mechanised flypress.
Those are his, in the second link above, which he brought over from Korea.
The asians still believe in simple hand operated tools, as manual labor is still cheap there.
Meanwhile, in the US and Europe, the work that used to be done on fly presses is now done on half million dollar TRUMPF and AMADA CNC turret presses.
A fly press is on my personal wish list- probably one of those Indian models, as there are virtually no used 1900 era american ones for sale within 2 or 3 thousand miles of me.