I have an autohelm 4000 and am looking for a place to find parts. In particular, the drive unit that is attached to the wheel contains a drive belt and a number of smaller wheels on the inside. The smaller wheels ( plastic)are attached to the outer frame ( also plastic) with small screws. The plastic has broken and a couple of the the smaller wheels have broken away. I can probably glue it back, but I dont think that will be very secure. The item is out of production, and the raymarine dealer tells me that parts are no longer available. I hate to turf it and buy a new unit...as it still works. Any idea where I might be able to find these parts.