JOH wrote:
This might be the wrong group, if so, please point me in the right
direction.

I need to find a supplier from whom I can purchase a small and very
quiet electric pump, one that will run at about 1/2 to 1 gallon per
minute. The fluid to be pumped is oil (sesame, coconut, olive) or
milk (buttermilk, coconut) or water.

This IS the wrong group. I suggest that you look for restaurant suppliers.