We have a Hunter 26 with the split swing rudder. The actual rudder is positioned between two plates that are attached to the tiller. On the two plates are two large rubber bushings at the bottom of the rudder and two plastic ones at the top. We have been trying to find some of the rubber material for the bottom bushings in order to replace the material there which has begun to rot. Hunter no longer makes this rudder apparently and we have been unsuccessful at finding the material elsewhere. Any suggestions?