And you may be mistaken. The Sunbeam was a shrouded P-6 with 80" Boxpok drivers and a true nose cone. The Pacific Lines streamlined maybe four P-8s with 73" spoked drivers. I think Weaver considered the Sunbeam, but that was toward the end of their imported model business.
I could be wrong - somebody may have a photo of an O Scale Sunbeam to share?