They are definately not available here yet, I got mine in the USA in the summer. If you have a shop and ship account with Aramex they might be cheaper to purchase in America as they are cheaper than in the UK
DDs have told me they don't believe you can get them here - they got theirs in the UK and online
ETA: they were also advised to get them tight-fitting as they stretch!
<em>edited by october on 19/09/2011</em>