i had this issue a while ago and now need some others. at the time i was quoted £50 from the dealers (not a chance i was paying that) ended up buying some from ebay - they were the right size etc but havent lasted very long!
Of the two different ones they have for the Clio, I went for the cheaper Valeo ones. Very quiet and work well. I think the others are Bosch and about a fiver more.