Have a look on eBay. Whilst this is a new item for Apple to sell individually, they've historically come with any portable machine bought in the UK.
I saw some on Amazon but I am always a little worried about safety when it comes to charging cables, plug sockets and the like. These things can be a fire hazard. They weren't much cheaper either.
Yes they do have them in stock but not on display. 2 metre length.
Excellent, thanks. I will check whether my local store has them and head over.