http://www.sigmasport.co.uk/item/Campagnolo/EC-RE209-Right-hand-Index-Spring/AVB
cheaper from here
@rustynuts started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
http://www.sigmasport.co.uk/item/Campagnolo/EC-RE209-Right-hand-Index-Spring/AVB
cheaper from here