here is a site in OZ that has all the DUBRO steering connectors / shaft couple rs / proper uney joints with bearings/ s steel and nylon bearings + a 1000 other things
Allen Keys, Antenna Cowlings, Antenna Tubes, Axles, Ball Links, Ball Drivers, Bellcranks, Cables, Clevis, Clips, Collars, Connectors, Control Horns & Links, Couplings,
Crimps, DVDs, Fittings, Fuel Bottles, Fuel Connectors, Fuel Systems, Fuel Tank, Fuel Tube, Gas Conversion Stoppers, Gear Block Sets, Heat Shrink, Hinges, Horns,
Kwik Grips, Kwik Starts, Kwik Stops, Landing Gears Latchs, Linkages, Links, Mixers, Mounts, Nuts, Pumps, Push Rods, Reamers, Retainers, Rod Ends, Screws,
Screwdrivers, Servo Arms, Servo Savers, Shafts, Spinners, Steering Arms, Stoppers, Switches, Tap & Drill Sets, Tape, Threaded Rods, Tools, Tube Benders,
Turnbuckles, Valves, Washers, Wheels, Wheel Covers, Wheel Retainers, Wing Mount Kits, Wrenchs, Push-Pull Cable.
All dimensions on this website are shown in mm unless otherwise indicated
http://www.hobbyparts.com.au/store/partslist/dubroaccessorieslistedbydescription/Dubroaccessorieslistedbydescription/all/1/BallLink/