You could try power steering no leak, stop leak, or conditioner. I have not used any of these products. Some of the products here are only fluid, not a conditioner.
If you are into DIY, or have an independent mechanic, you could get a rebuilt pump or one from an auto wrecker. Auto parts stores should carry generic replacement hoses and perhaps the cooler, but these also could be purchased at a wrecker.
For your own peace of mind, you should track down the leak.
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