First of all I'd check its not the ballast or igniter that has blown, but since these lamps are cheap enough no harm in buying a spare set!
http://www.hids-direct.co.uk/hid-xenon-bulbs/d2s-hid-xenon-replacement-bulbs-p-447.html
I think they definitely saw you coming. No doubt the kwik-fit bulbs will probably be from the above website or similar. They wont be genuine renault neway.I got mine done at Kwikfit my mate works there and it still cost me £89 a bulb
RRP is £189
That seems a tidy price.
Are they the same colour as the xenon lights in the Clio's?
As in, I could get away with buying just the one?