I need two orings that boat.net say are no longer available from Tohatsu. One is the oring on the bottom of the water pump housing and the other is the oring on the prop shaft housing (the one up in the lower unit, not the shat seal itself). The part numbers are 345-65015-0 and 345-60103-0. Can anyone help me locate these? Also, i have the oring dimensions, so if i can just order a "generic" oring with dimenssions that are reasonably close, that would probably work too.