Aftermarket power steering pump

i think my stock power steering pump is bad. I have a 99 I-6. Does anyone make a quality aftermarket steering pump for my application. If so what is the model number and who sells it. I noticed summit racing had 2 different models i think by AGR but for the application is said Jeep cherokee through 86. Not sure if it will work. here is a link to both of them.

http://store.summitracing.com/defau...earchinresults=false&N=0&target=egnsearch.asp