Shure SM58 mic foam crumbled away
(San Mateo, CA)
I have a pretty old Shure SM58 mic that used to have a foam screen over the diaphragm housing that just crumbled away. (See picture for detail.) I know I can replace the screw on windscreen, but is it possible to replace the foam on the diaphragm? If so, how? Is this foam even necessary?