Thats a standard Sachs clutch and drive plate with Kevlar stuck on to the standard drive plate by another company. Don`t touch it.
Interesting, they were definitely charging more than JKM were when I ordered, I'd already been given the heads up on Competition Braking by glynnd. I guess I got something JKM already had in stock, at a suitable price covering what they paid even though the actual price had gone up...
edit - I still have the emails. CBP were out of stock, but pointed me towards Jabbasport (who never responded to my email) and quoted me £536.25 + VAT for the cover and plate, JKM were £509.44 + VAT for cover and plate.