I am looking for the GM part # for the original AD truck 5" round outside mirror head highlighted in the Jim Carter Truck Parts "technical article" --see the attached photo. I would like to try and track one down. Any help related to this matter is appreciated.

Thanks.

LUKE
Attachments
IMG_4903.jpeg (224.59 KB, 203 downloads)

1948 Chevy 1/2-Ton 5-Window Deluxe
More pix in the Bolt Bucket