I talked with a guy who do all the work for the big reference restoration shops. He said that the aluminium tags were used as is up to 1967 and in 1968 they started using blue for automatic and red for stick shift. They also moved the date code to the tag instead on the carburator body.
Today I was visiting GE Healthcare here in Umeå. During the round trip I noticed that they had several suppliers using special packaging protection. After a closer look I found that the material was just what I needed for my "what you called them" on the inner fender towards the frame.
After some sawing they was just as they should be. When mounted it looked just as it did on the assembly line!