Folli Follie only have 5 retail outlets in the UK, 4 in Lonon and 1 at the Aviemore ski centre. They don't seem to have an online presence, so it seems unlikely that you'll be able to obtain their products without a good deal of travelling.
It's possible, however, that they might have some sort of mail order service. The phone number for their UK HQ is 0207 2879912, so why not give them a ring and see if they can suggest a way to help you?
(Information obtained from www.follifollie.com).
Chris