Thanks for the info @3_puppies and @1969FJ . If anyone has a top view picture of the aisan blue back plate, I could also look into getting those made. I'm sure it could be made from a stainless plate with glass enamel powder to stand up to the gasoline. Does anyone know if that is how they created it?
I've got the one returned to me after the guy couldn't get it done at a reasonable cost. It is fairly thin, thinking any baking for a powder coat would warp it.
not all the carbs had it or they were tossed during a previous rebuild.
I'll dig it out Friday or Saturday.