Sounds like you have been shopping in the wrong places. From your descrition it sounds as though your rh main bearing or the one way roller clutch (looks like a bearigng) have dammaged the rh seal and or the pocket that the seal sets into.. Worst case scenerio you would need a new set of engine casings(new, they are only sold as a pair), all of the seals and gaskets you are looking at under $160.00 for new and about $75.00 in parts if you go with just a used right hand case and all nw seals and gaskets. . Any respectable repair shop would charge about $100.00 to do the installation . Bearings and such will add somewhat to the price but any dealer that offers to do $600.00 worth of work to your engine is Either incompetent or a rapist.