1928 REO 18" wire wheel lock rings

I am looking for lock rings for the 18" wire wheels that are on my Canadian built 1930 Dodge DC-8 Coupe. A 1935 National Wheel and Rim catalog states that the lock rings are the same as those used on the 1928 REO Wolverine. I am trying to confirm this, and hopefully find some. I have attached 2 photos of the correct lock rings for my coupe.

many thanks in advance for any help,

David<!-- google_ad_section_end --> <!-- / message --><!-- attachments -->