I have a lot of files... And though I have never counted, I know it is over 100 of all shapes, sizes and qualities. Gotta love the things they sell at Harbor Freight that they call files. I have very decent files that were made back in the late 1800's, but I only have a couple of those, and they are large, so limited in use. I don't have any European files, though I have been considering trying some Grobets lately. My favorite files though are old Nicholson Black Diamond files, which I believe used to be made in Philadelphia, but are no longer produced. I have one of these that I use almost ( I said almost ) exclusively for draw filing barrels.
I know that we are a very small segment of society, making guns in a fashion that has not be fashionable for at least 200 years, but we are not the only craftsmen on the planet who need quality files. There are luthiers, jewelers and tool and die makers to name a few professions, who all need quality files. It seems these craftsmen can find them. And yes, many use Grobet and Pferd, but I know there are others who produce quality files. I have a straight sided triangular file that I converted to my dovetail file, and it works quite well. Believe it or not, it is a Popular Mechanics label on it, but also a 'Made in USA' stamp as well. We just have to search for quality a little more these days.
Matt