http://www.tyretraders.com/tyresearc...l&tyreType=All
~£870 for a set of 3Ds delivered in your exact size, so about £920ish by the time your local tyre guy has fitted them for you.
Cautionary note - these guys tend to carry a low stock and order in as they sell, so check 1 or 2 days after ordering to make sure that they haven't "lost your tyres" or "the courier hasn't picked them up yet for some reason" (aka they forgot to order them). Other than that they're friendly guys with cheap prices, and a much better range of rubber than Camskill on the whole.
(If you do decide to go non-RF then the Pirellis at under £600 delivered are a bloody steal....)