What Argosy model do you have? I am not sure what OV64 is gonna do with it but your Argosy is the same as his Argosy (a Minuet) they didn't originally come with hupcaps, just center caps. I think the regular full size Argosy's had full wheel covers. Maybe he is just collecting. When I replaced the wheels on mine I went back with a generic center cap which popped onto the lug nuts. Looked awful close to original.
Where is Drasco in Arkansas? I grew up in the Ozarks, I guess it is somewhere south?