Welcome Murphygirl
here is someone you can contact...
when I lived in California I use to get parts from a one Bill O'grady
out of Fremont,ca he has TONS of 67-72 trucks and parts and all rust free great used shape
his website is
www.vintagechevytrucks.com
I think try that and if that doesnt work let me know and i'll correct my info lol