I replaced most of my fluid with Lucas Power Steering leak and a turkey baster... (very ghetto), whinning sound went away but it has become hard to turn the wheel when idling and standing still lately.
Rock Auto sells this:
http://www.rockauto.com/catalog/moreinfo.php?pk=1787108
which is a reman'd pump... (most of em are apparently) or a seal kit but from what I can figure the impeller blades are wore down hence not pressure at idle. I will replace mine with one of these along with a new Alt in the summer (If it'll last that long).
Gotta remove the belt pulley bracket and loosen the mounting bolts through the big holes in the pulley. Loosen the pulley bolt BEFORE removing anything. I guess there is a special tool that is used to take off the hose connections to the pump? Anyone hear about that?
Most importantly, replace the turkey baster before thanksgiving comes. I didn't and told my wife it had a hole in it so I could get dessert!