I have a 282 sailfish year model 2004. I recently removed the wind shield wiper arms to try and remove some surface rust. In doing so I stripped out the busing insert that goes over the motor shaft. The bushing insert measures 9/16" outside dimension, and the shaft size is 1/4". Im having a hard time getting any Grady dealers to help me out, and Im being told that they changed the busing insert after the 2004 models. Can anyone give me any advise? I would like to replace the arms and blades but cant do this without finding the busing inserts first.