Purchased an 32' Irwin classic. On board is a raymarine autohelm st 3000. I know this is not Irwin related, but, where the motor mounts to the mounting bracket, there is a piece missing. I have the clutch lever and the cam, but there is a space for a washer of some kind. If you are familiar with this, can it be fabricated or where could I get one? There is a small pin on the end of the cam. Hope you can help.