I designed a visor template for my M20E.  Figure I would share them here if it is useful to you.   You can buy 3mm acrylic glass in any color you want from Amazon.  If you have access to a CNC laser cutter and a 3D printer, you can have your self a pair replacement visor in about 20 mintues.  DM if you need help locating a place with a laser cutter.  The visor clip is designed for visor rod that is 4.7mm.       Visor Clip Flat Tight.stl visor.dxf