1964CutlassSC

At the OCC show last weekend, the guy judging my car said that it was missing the decal that goes on the AC oil filler "breather" cap. He said that most are missing it because of how dirty it gets. He also said no one reproduces it.

Does anyone even have a picture of what one looks like? I have never seen one. I saw I could order one online for a 64-67 Chevy but wasn't sure if it was the same decal.