Forum sponsor Porkchop BMX has the 19T Bendix cog w/trim kit and loose 1/4" balls. huskybicycles.com has Bendix caged 10 ball and 7 ball hub bearings.Sheldon Brown/ Harris Cyclery parts for Sturmy-Archer hubs; large selection of 3-tab cogs that fit Bendix CB too,but are slightly offset.