Bassbob
Emissary
You can make them yourself. Hell an oil filter is good for a couple rounds and all you need is a bushing. The reason they cost so much is because of the government BS involved with owning one. Take suppressors off the NFA list and watch the prices plummet.In other parts of the world, where using a can is just good manners…you can buy them for as little as $20; these are usually only good for 2-3 rounds, though, and would be used for hunting.
A buddy in New Zealand mentioned it one time.