If you recently purchased a SmartBand Talk SWR30 then you will have been stuck with the black wristband, which may or may not suit you. If not, then the SmartBand Talk Wrist Strap SWR310 is now available in Europe via the Sony Mobile Store and some third-party sites such as Amazon.co.uk and Amazon.de.
It is available in both small and large sizes for £24.99/€24.99 on the Sony Mobile Store. Amazon has it for slightly cheaper. This will get you red and blue straps. Sony is also planning to release pink/lime straps, although these are not available right now.