As has been said, eBay can get some, but they are most likely to be just a cheap from TwingoGeekeo off here, he works at a Renault Parts department and can get good discounts for forum members. Search for his name and drop him a PM.
Where did you get your silver RS sticker from that you have on your front bumper mate?
They are a nice size and still keeps the normal RS 197 look separate from the R27 model. In other words without a 197 looking stupid with R27 stickers on.