BMW Repair: 99 528i power steering reservoir 90K miles, crownauto, oil reservoir

Question
My powersteering oil reservoir is cracked and leaked oil, damaging the pump.  Fluid is grey and pump noisy.  The car is only worth $5K. Would you think a rebuilt pump from O'Reilly's and a used reservoir would be OK?  If so where's the best place to look for a used reservoir and what models fit mine?

Answer
Yes, I would use a rebuilt, from O'Reilly or ???.  You can do better on line for price.

For the reservoir, you can chase junkyards.  I'd advise just buying one from what I have found to be the lowest price on-line dealer parts.

https://secure.webmakerx.net/Default-2.aspx?hostname=parts.crownauto.com

<$50