This is a complete set of the early wind wing brackets for open cars except for one screw, which could be make on a lathe.   They need plating and I have a few extra parts, including all the rubber pieces that grip the glass.

These actually work, I have a set on my Phaeton, they do not need to be glued to the glass, they just work correctly.  Plating can be expensive but worth it for a set of these that actually work correctly.