I am trying to find a replacement clutch for a Scag 36 SW walk behind. The manual says it is a Ogura and the Scag part # is 461073. I assume it has been replaced already because a Warner 5215-99 is what was in it. Neither of my online parts houses show this or the original #. I know the warner must be a better and once replaced unit but is there a newer updated unit? Anyone been through this?