Probikekit have carbon ones on sale at the moment for £13. They've got some nice Ritchey alu ones for under £20 too.
http://www.probikekit.com/display.php?code=A9183
http://www.probikekit.com/display.php?code=K8006
@kyuss 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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Probikekit have carbon ones on sale at the moment for £13. They've got some nice Ritchey alu ones for under £20 too.
http://www.probikekit.com/display.php?code=A9183
http://www.probikekit.com/display.php?code=K8006