Dave,
It would be interesting to see a Fulton advertisement for the 54/55 sunvisor. Maybe the style changed for use with the one-piece windshield? There was a GM a sunvisor in 54/55 but I do not know if GM made a truck sunvisor between 47-54.
If you want contact-information for a person who most likely has correct information on both GM and Fulton sunvisors (and he knows where you might buy them), send me a message.
Tim
