The Choker Clamp comes in both 31.8 and 34.9mm sizes (you will need the 34.9mm size for your frame).
They will be in stock in the next couple of weeks and will come in black anodized or white powdercoat. The good thing is that they cost only $15 and are almost as light as a Hope Bolt on.
Feel free to drop us an e-mail if you have any questions!