You can buy replacement blades easy enough, not sure on how to actually do the replacement though. For the first Keo Blades they had a £150 tool to prize it open while you fit the spring.
http://www.sigmasport.co.uk/item/Look/Keo-Blade-2-Spring-Kit/AAGR?gclid=CjwKEAjwwbyxBRCS74T049iEp0wSJACkO5v1UJ7l02Cs8HKTDT6QfQUPIUV8M8gWhIc8cO7_WUgJZxoCm-nw_wcB
@Sumo 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.
You can buy replacement blades easy enough, not sure on how to actually do the replacement though. For the first Keo Blades they had a £150 tool to prize it open while you fit the spring.
http://www.sigmasport.co.uk/item/Look/Keo-Blade-2-Spring-Kit/AAGR?gclid=CjwKEAjwwbyxBRCS74T049iEp0wSJACkO5v1UJ7l02Cs8HKTDT6QfQUPIUV8M8gWhIc8cO7_WUgJZxoCm-nw_wcB