I have a 1979 L185 that I need to rebuild the hydraulic pump because of it leaking fluid over into the crank case. I found a few threads on this topic and say where a couple people said they got everything to do this for around $25. I got the part numbers off one thread also. Then I called messicks just to be sure about the part numbers. They emailed me the breakdown diagram of the pump. It's showing several different orings and seals. After looking all part numbers up I'm at $75 before shipping and 4 of one oring and 1 of another is not available. Has anyone personally rebuilt this exact pump? Where did you get your parts from? Do you still have the part numbers?