My first (and cheapest accessory for my C2S)... valve caps
So popped down to my local OPC (Porsche Hatfield) and asked the parts department what they had - the sold me a set (4) of tyre valves (the complete valve) with a nice full length metal sleeve with porsche logo.... the cost, a mere Pounds9...looks great...
Sorry, didn't get a chance to take a pic.
Rgds
Prashan