Rear turn signal…ears?

So the Z1r project I’m warming up to start the rear turn signal.. ears.. brackets, mounts.. are gone, cut off by P.O gods knows why, so I’m going to attempt to fabricate my own. Mild steel, 3mm, they will look the part but obviously won’t be 100% the same but I’ll make a real solid attempt to get them there. This is the drawing of the outside. They are a copy of my 78 z1000.