Saw sharpening was a small business affair up into the 70's in the US.
Anyplace you could buy nails, you could have your saws sharpened. Every hardware or lumber dealer had a "circuit rider" who would pick them up and deliver them back to the store. If it was important to you, you had to learn the schedule and then your saws would be done in a couple days.
Every town of over a few thousand population had at least one saw sharpener. Handsaws and round saws. Most of them also did reel mowers as well. Reel mower blades are not so easy to sharpen well, that the average homeowner was any good at it.
Belsaw and Foley were the main saw sharpening equipment manufacturers. If you never saw their ads in the back of Popular Mechanics magazine, you have never read that title. I think they may have been advertizing in 1909, the year they started.
My own guy was named Dexter. I live in a tiny town. The only saw shop here in town was for chainsaws. Logging was the lifeblood of Happy Camp, not much construction trade.
Dexter had his shop in Yreka Ca. the county seat. I did business with Dexter for years. But the machines never did do as well as hand sharpening, for a handsaw. So I just had him do my circulars after the first couple handsaws I had him do were not very sharp.
Dexter was in business as long as he lived. He became quite elderly in the end and still sharpened. But disposable blades were coming into fashion.
After he died Marie, his wife, took over for few more years but it was a meager business.
The last shop in business that I know of is in Medford Or. The largest city hereabouts.
Cal Ore Carbide is the name. The business has moved from steel blade sharpening to working on carbide tipped blades now. They may still have the old Belsaw in back if you want a handsaw, but you would be better off operating the machine yourself since nobody there knows or cares.
Mark Harrell of Bad Ax Saw works is making a heartfelt try at petitioning all the filemakers to start making saw files again. It has become completely dismal trying to get a decent saw file.
But it may be too late and our little enclave of saw people is simply not enough.
Antique NOS is the last resort in saw files, and we are vacationing there now, but our reservation is ending soon.
yours Scott