I contacted South West and they told me this:
Thank you for your enquiry. Unfortunately, Noble are no longer stocking the AP Racing discs for the Noble M12 and 400 models. They only have rear grooved left in stock. They are re-engineering the brakes for the car and I have attached a link showing the brakes discs and bells that they will be producing in the future.
When these are available in stock we will be able to ship to USA.