BlackIRON

Hey guys i just wanted to know what are my options for a 99 pump replacement? its giving me very rough vibration at low RPM's ,anytime the AC is on the entire car rumbles as if im driving down a mountain. It may also be a steering rack issue but im tackling it one step at a time and would like to know of any aftermarket parts i could get my hands on for this, i know there is a pulley kit, but are there any good quality non-OEM ones? or am i better off with a new one on partsgeek?