Those are the Abarth 500 EsseEsse version of the 18" EsseEsse wheels (in white) off my Abarth Grande Punto EsseEsse. Check Abarth parts and spares catalogue. (I carry a wonky white one as a spare in my GP, as the rats don't supply a spare anymore!
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You can get wheels refurbished you know? Try Googling "alloy wheel refurbishment near me".