Heli Direct usually has had the linkages in stock if not. I just use the pitch linkages (EFLH1151) that are on the regular head for the short linkages and for the long ones get an align linkage set (HS1034T) comes with small medium and long lengths. Use a set of the ball link ends from the same pitch set from the regular BCP head screw them on to those long linkages and your good.