Ebay! got some cheap aero blade type wipers that work well. something tlike this http://cgi.ebay.co.uk/RENAULT-CLIO-...arts_Vehicles_CarParts_SM&hash=item2a0ce707c1
How long have you had them on? I had some like that off ebay and they rusted within 6 months and the rubber perished within a year. Wouldn't bother with the aero ones unless you wanna pay for bosch.
I don't really like the look of the aero blades