There are a lot of these small suppliers around the world no one really knows about. A former boss of mine had a side business making blade balancing weights f

There are a lot of these small suppliers around the world no one really knows about. A former boss of mine had a side business making blade balancing weights for helicopters. He would take a few weeks every few years to make a big batch then ship them over. I found it surprising at the time that a one-man show made the blade balance weights for 1/4 of all the helicopters in the world as a part-time gig in the middle of nowhere. Just goes to show there are still plenty of niches out there if you can find them.