dliptak,
Look at my 1957 Fire Engine in the gallery...I believe I am running the mirrors you are looking for.
They are mounted to the door with back to back ell brackets that are cut and drilled to the same shape as the pickup brackets base. The mirror arm is a piece of pipe that is flattened on both ends and drilled. The only tricky part about making a set would be getting the ends "indexed" correctly. The door end is flat parallel to the ground while the mirror end is more verticle. I'm not able to look at my truck this week, but can take measurements this weekend if needed.
Mike B
