I just found out that my gf's 99 honda accord 4dr ex need a new a/c compresser. It was making a knocking sound and the dealership told me that it needs to be replaced. Where is the best place I can buy them at? Also is there a difference in terms of 98-02 ones? I know I can purchase used one on car-parts.com but want to make sure that the a/c compresser is same from 98-02.