Ring Gap File near Baltimore needed....

So as it turns out, none of my usual go-to peeps have a ring file. Building Jake's stroked 360 and we are at that point. Any members within an hour of Baltimore wanna help a member out? If you are real close, maybe borrow it? If if not real close, but an hour or so away, got one ya wanna sell cheap? Couldn't find one local to buy off the shelf anywhere today. None of the parts stores with tool rentals had one either - they act like they don't know what we need one for.....