Last week the brake was broken and my husband bought a new brake in ebay and it was so easy to change. He found many brake's sellers and he bought to the cheaper one. I leave the link where he bought it if you can help.

http://www.ebay.com/sch/i.html?_sacat=0&_from=R40&_nkw=bugaboo+cameleon+brake&LH_PrefLoc=2&_sop=15

Go to www.buggypitstop.co.uk they will be able to help you with the brake cable.