RRP is £156 + vatDealer finally found them but they're quoting £180ish each and they don't deliver. Where did you manage to get them for £110 +vat?
To get them cheaper is down to the individual dealer and how much discount they are willing to give.
They buy them direct from Renault UK for a set price and mark up what they wish and sell to the public. It's then down to the individual dealer if they want to give a discount if any.
The best place is Renault Wolverhampton who offer huge discounts on parts.
Give them a call direct and the part number and see what discount they offer.
If in the trade or a member of staff most company's sell parts at cost price plus 10% or cost price plus 20% as they want to make something on the parts.
Almost all Renault dealers along with others are run or owned by companys like "Arnold Clark" or "Evans Halshaw"
I now don't know any dealer that is run by Renault UK as it did when I worked for them.