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The wheels are available. They are stamped "Cup 3" and made in Italy. I really don't know anything about them other than what is stamped on them. They are cast aluminum with essentially an integrated spacer that provides the correct offset for an '80s era Carrera. They are have some type of chrome/silver plating, not painted. They were mounted on an earlier car that is now gone.
Sorry I can't provide more details. If you want some pics, I can forward some.