Don't we all!
Pour a little oil into the bad cylinder and do the test again. If the compression goes up then you should be okay with just a new set of rings.
Don't forget you'll need a bottom gasket too - leave the head attached to the barrel as it'll save you a head gasket.
Be prepared to do more though if you find the barrel or piston are scored. it would be a real false economy to rebuild with damaged components...
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