LOOKING FOR SHIFT LEVER ASSEMBLY. HALF SPHERE, MAYBE CALLED WOBBLER IS WORN AND PIN THAT HOLDS SHIFTER IN PLACE POPS OUT OF ALIGNMENT CAUSING PROBLEMS WHEN TRYING TO SHIFT GEARS. MAY TRY LONGER PIN OR SOMETHING ELSE IF I CANT FIND ANY PARTS. PIN SLIDES UP AND DOWN IN ELONGATED HOLES AND GEAR SHIFT RISES TOO HIGH TO ENGAGE TRANSMISSION. ANY SUGGESTIONS OF WHERE TO FIND PARTS OR FIX THIS PROBLEM IS APPRECIATED. ALSO MY MECHANIC SAYS TRANSMISSION IS IN EXCELLENT SHAPE WITH NO WEAR THAT MIGHT CAUSE THIS PROBLEM. THE LEVER JUST WONT STAY LINED UP.