I have a Devilbiss Finishline 3 gun. Today I managed to lose the little tube/pin that helps keep the baffle in place. I'm not sure if it's supposed to be a loose fit vs in there tightly. Anyway, I thought it would be easy to find a replacement part, but all I can find is the full baffle with the tube. That's a $50 part when all I need is the tiny brass tube. Any ideas on size and where I can find something that will work?