I am in need of a "mushroom" cap to replace the pointed one on my DI plunger. I am trying to set jointer knives and the pointed one is a bear to deal with. I have tried several machine shops and all they have are the ones with female ends I need male to screw into the plunger. I tried doing it without the cap just using the end of the plungers but this has turned out to not be an option.