i replace the water pump in my 96 contour V-6... the new complete pump from the ford dealer was about $120.... it works great now.. to get the whole thing out i had to remove the battery, the battery tray... the new pump came with both hoses attached so you dont need new hoses.....
i would not waste time trying to weld the body of your old pump.. probably made out of pot metal and will not hold for long....what ever made the hole will problaby keep the leak coming later when you riding down the street????