Cervelo Test Team - TdF Helmets

[Sortie 10]

Need a new lid, and quite like the design of those worn by the Cervelo riders (similar is also worn by Euskatel I think). A few questions:
1. Who makes them? (Both teams' websites are hopeless)
2. Where can I buy one, preferably in SW England? (I have a large head, and for safety & comfort want to ensure a good fitting so would like to buy from a store)
3. Is my taste dubious?!

Thanks for all advice