UPDATE:
I was now loosing about 8g over a 20 hour period. Thank god for extra towels and my wife tag teaming with the towel brigade.
I knew the risk of using and old salt water pump from someones shelf but needed to anyway.
I decided I had little to loose and decided to take the loaner pump apart and see what I could do.
Through this, I was able to take my old pump and the loaner pump and use different parts from each to create 1 pump.
I ended up using my motor, fan, back cap and rear volute housing, Dave's impeller and front volute housing and my o-ring.
Had a lot of clean up work on the motor shaft and needed to use a die on it to allow the impeller to spin back on and seat in place.
Then I installed the new rear seal into my original rear volute housing and the front seal onto Dave's old impeller.
No leaks, throws water like it was new, and runs cool and quiet. NICE!
MORAL: salt water pumps sitting for extended periods may leak unless meticulously cleaned before shelfing.
Come into work this morning to find one of my 4 door flower coolers is not cooling and hot. SHOOT - lol