2001 hustler 60. kawasaki 23 hp. fh-680v-bs01. motor failure started with a major oil leak , upper seal was pushed out and small metal frags were present (odd?) I replaced the seal and the motor ran 'ok', but the flywheel bolt "moved around "when running .so i pulled the crank out and the upper bushing was bad , i know that the dealer can't sell the bushing by itself ,without the upper block half. this motor has less than 600 hrs on it .and is in very good shape . my question is , does any one make a bushing to replace this one ? the bushing is a metal band type ,like a cam bearing , is the metal surface of the cam bearing the same as the bushing of the upper crank?