http://www.auto-nation.co.uk/cart/home.php?cat=330
When i was looking these were the cheapest I found, but there maybe some even cheaper somewhere else!
they're not much more expensive from Renault (£55ish?). just need to be aware that the 172Cup dampers are different to the 172's
ktec are more expensive than the stealers
get the oem renault ones i had to get some and they were £26 each from renault because my bro works there