You need some shy retiring "Katie Hopkins" type for that plate to sell, I'd stick to the merits of the vehicle, lowish mileage, strong colour, clean interior and above all power with economy and being a Arosa, prettier than a Lupo
This guy in latvia will do them and a lot cheaper than UK ones: http://stores.ebay.co.uk/5-spacers?_trksid=p2047675.l2563
You want hub centric so avoid any cheap ones that arent.