Here are some photos of a rack which is most probably a true original. It came from a local car here - '36 Phaeton which has been owned by the same person since 1949. Now, I'm sorry I didn't take more pictures of the main rack. At the time I was more interested in how the attaching hardware went together.
Notice the doubling of the sheet metal reinforcing the bracket attachment in the photo in the lower left corner. According to the original engineering drawing, this improvement is a characteristic of the '36 rack (only) and distinguishes it from a '35 rack.
Earlier in this post I was looking for just the mounting brackets and did not find them on a stand-a-lone basis.....but Dick Spadaro's 1-800-222-3248 was willing to call his USA supplier and got me a stand-a-lone price.