Fords power steering pumps are the worst about being noisey. Most of the time, like some of you stated already, even when you do replace the pump its either the same, or worse.
The Guy with the Friction Modder above is right on track. That is exactly what I use at work only its says QMI on the bottle. Its got teflon and some other things in it I dont know.
If you check your hoses for soft spots, this can indicate a hose that is caving in on its self.
Otherwise my only recommendation is to flush your entire power steering system and refill with FORD brand fluid. Sticking with Fords brand fluid for some reason keeps their pumps quitter. This is what I do when I get noisey pumps, go right to the manufactures fluid and it usually stops. Ive got 143K on my OEM pump with me actually flushing it every 15K miles. I still have no issues.