Need a Replacement Valve

I developed a leak in my CO2 regulator output valve.
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It has a built in check valve, which is important to keep beer out of the regulator. I’ve looked around, can’t find a source. Anyone out there know of one? Thanks!

Check MoreBeer. You might need to go with brass, but it’s fine. Other vendors offer them as well. Not a hard part to find.

More Beer has a similar one, thanks Stevie.

Thanks, Zach DuBord! AIH has the exact part, $12.99 plus shipping and tax, adds up, but it’ll work. I’m going to get some QD poppets, etc., to spread the shipping cost. Thanks a ton! http://www.homebrewing.org/Gas-Shut-off-with-check-valve