We'll, it just keeps getting better and better. My beautiful old '76 450SL I recently purchased began puddlin yesterday

. Although I don't see anything leaking from the weep hole (if it's on the top of the water pump), I felt under it and it appears to be wet

. This is consistent with water I can see on the front of the oil pan and the dripping is coming from the back of the oilpan (when parked in driveway). I didn't seem to feel any leaks at the hoses and when I squeeze the top hose it feels empty if that makes a difference

.
So can anyone give me advice? Can I rebuild something here? I can change the Water Pump myself I think. Does anyone suspect I might have misdiagnosed?
Anyone have any insight into changing the water pump? Also, any suggestions on where to get one cheap?
RZ Rob