You can get them cheaper from a couple of traders on eBay and from Wing Mirror Man (can't remember his web address), but from Renault they're around that. I was surprised myself when I had to replace one. Has your drivers side been done too?
Having a browse on ebay at the minute Willis, but I can only see ones to fit the 197.
I'll keep searching. I'll try and find this wing mirror man too. Thanks for your help!