I have a pair of good quality CNC machined brake and clutch levers by REVO which I believe are re-buildable if required.
These are in very good condition and removed from my 2002 Curvy.
Not sure if they will fit later models.
These are not cheap Chinese copies but good quality.
Take a look
http://www.ebay.co.uk/itm/REZO-Short...19.m1438.l2649
Looking for £40 inc postage