If it helps, I saw a set of Cadiz where the owner had blacked out parts of the silver sections and they actually looked really good. I think it was a kit he'd bought rather than a one off. Might be worth researching. I do think Prets look great but they are really expensive to replace and 18" tyres are considerably cheaper too. Google VW Cadiz wheel wrap, there seems to be a few options. Much cheaper than a second set of wheels.