I'm going to replace the PDS bearing and u-joints in my 1990 131-a with sp-a outdrive. I've seen the bearing/seal/uloint part numbers on other forums....what I need are the numbers for the plastic bushings where the outdrive mounts with the large pins. I also need to replace the bushings on the steering yoke and the helmet bushing. I found the number for the helmet bushing, but I need the rest. And also a good source to purchase the parts from. Thanks....