Aap should carry them. They are not too bad to change once you get the axle nut off. That can be a real pain in the a$$ unless you have a STRONG impact. as far as price goes aap has a pair for 145$ pt # 513121. If your taking it down that far I would replace the axles too. depending on the mileage of car. aap has them as well 70$ ea. or you can buy from GM for 110$ ea.