jb, I made my own. The can is 1" ID aluminum with end caps welded on. One end cap has a 1/2' spigot so I can attach the stock hose. I drilled a few 1/4" holes in the can so I allow for air movement. So far I cannot feel much air being pushed out but I can smell it if I really concentrate at a stop. That might be my imagination! Remember, I have a mill and lathe. I'm retired with too much time on my hands. I made a spare.
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