KMC do decent ones (as are their chains in general), few quid is all they cost, MOST bike shops have a few of them lurking somewhere as you usually need them for gear hub shopper bikes (which don't have much chain tension adjustment).
@BrickMan 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.
KMC do decent ones (as are their chains in general), few quid is all they cost, MOST bike shops have a few of them lurking somewhere as you usually need them for gear hub shopper bikes (which don't have much chain tension adjustment).