I got them from Renault directly, painfully expensive tho. £356 for the pair. You can however order them here and I recon they will be cheaper...
http://www.allpartssouthwest.com/html/renault.html
You need the MK4 lights, sorry I don't have the part number but there are three types of lights and you need the ones with cornering lights and H1 bulb for the main beam.