This would be for a 1/12 scale model. I think the emblem would be approximately 3/4" in width. I`m not too concerned about the material used as long as I can glue it to the model and paint it with chrome paint. Do you happen to have a recommendation on who could make that?
Send Joseph (aka Chief Joseph) a PM, he might be able to help do some one-off brass PE parts to your specs, then you could either use a metal chrome kit, or alcad to finish? Looks like a cool project!