Do you know if they look similar to this with the red, white and blue ring? I have the 1966 parts catalog that shows a medallion part # 2603211.
You probably need to find a 1967 Chrysler passenger car parts catalog and service manual. Just Google your Chrysler part number. Did you get anywhere with your dashtray?
You may want to see if these guys can help. They skip over the 1967 300 model, but have links to the other heritage Chrysler websites. They should welcome 1967, etc. owners if increasing membership numbers are important to them. Joining a car club has great benefits in parts procurement, possibilities and answers, not to mention the fellowship: