Have you tried Obselte Parts in Sac. area
or you may have to go to Calif. Industrial Rubber and get some rubber to make them like I did on my 62 Chevy. They have a couple of places in the Sac. area.
62Blue
Don


62Blue
62Chevy in progress
You've never been lost until you've been lost at Mach3" Paul F Crichmore (Test Pilot)