I stopped in at Napa today and they can have the pump to me in a couple days. I held off ordering it because the leak had stopped overnight. Dry as a bone, level down 1 inch since I filled it up around 9pm. At first I thought the seal may have swelled up but it's probably just plugged with residue. ?.
I'll try heat/cooling and see how it goes.
Napa here (Canada) charges $100 for the pump. $35 for the core. Quite a difference in price.
Thanks for the info you 3.
Aaron