New water pump leaks

After having pumps leak, have bad bearing(s) right out of the box, drive flanges pressed on at the wrong height, etc.; I've given up on new pumps.
I rebuild them myself.
ASE INDUSTRIES – AUTOMOTIVE WATER PUMP COMPONENTS
Having a press helps, but is not mandatory- a big vise and a couple of steel sleeves will get you there.
Once you've done one and see how basic it is, you'll never need to buy a new one unless the housing is roached.