Have you tried contacting customer service at dupont( Now called Axalta Coating Systems) or PPG with the color number? but truthfully you should just go to a paint/body shop that has a color scanner and let them scan the underside of the vent. (yeah I know it's a long ride finding a good one willing to do it) I have matched a teal from a 56 imperial that way (yeah it was a sucky green color on that dash) I had a couple ounces made up and then bought one of those aerosol sprayers from Amazon to paint it before I got my garage finished.