Get one of these and drill an axle sized hole in one of the clamps?
http://www.screwfix.com/p/irwin-quick-grip-12-mini-one-handed-bar-clamp/98247?kpid=98247&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&cm_mmc=Google-_-Shopping%20-%20Hand%20Tools-_-Shopping%20-%20Hand%20Tools&gclid=CMr1us_ZjcoCFcvpwgodKZgM0w
@Dammit 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.
Get one of these and drill an axle sized hole in one of the clamps?
http://www.screwfix.com/p/irwin-quick-grip-12-mini-one-handed-bar-clamp/98247?kpid=98247&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&cm_mmc=Google-_-Shopping%20-%20Hand%20Tools-_-Shopping%20-%20Hand%20Tools&gclid=CMr1us_ZjcoCFcvpwgodKZgM0w