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Could it be a WheelsMfg bottom bracket?
https://wheelsmfg.com/pf30-threaded-abec-3-bb-black.html
Take it to your local bike shop?
Could it be a WheelsMfg bottom bracket?
https://wheelsmfg.com/pf30-threaded-abec-3-bb-black.html
Take it to your local bike shop?
If you can draw the tool, your friendly local water jet job shop can cut it from whatever suitable metal they have laying around. Make sure you get a pair of wrenches just in case the sleeve would rather spin in the shell than unscrew.