http://www.monkeylectric.com/products/m133s_instr1.pdf - the final page of this pdf show the wire wrap they initally used
but they now have proper metal cable ties, not jubilee clips.
--edit--
ones like these - http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_746969_langId_-1_categoryId_255230#tab8
or these if you don't want them straight away - http://www.larkspeed.com/index.pl?a=i&k=s&p=119LMA2298
@MrDrem started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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http://www.monkeylectric.com/products/m133s_instr1.pdf - the final page of this pdf show the wire wrap they initally used
but they now have proper metal cable ties, not jubilee clips.
--edit--
ones like these - http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_746969_langId_-1_categoryId_255230#tab8
or these if you don't want them straight away - http://www.larkspeed.com/index.pl?a=i&k=s&p=119LMA2298