Vintage/Antique woodworking tools are like that, too.
To get a piece for a tool I'm restoring, I had to figure out the cell number of a guy who bought the property that had the warehouse from a defunct dealer on it, and beg him to go through it for me. He runs an actual business, and bought the warehouse as somewhere to store his day-job machinery, not realizing it was the go-to for this particular brand of vintage machinery.