I have never heard of anyone rebuilding them, if you are keeping the car for a while I would say the MCS single adjustable would give you a huge return for your money in ride, handling and looks. I am not trying to sell you, if you look around for people who have bought them you will see that they are a great value and even if you sell the car later you can swap them out and re use or re sell for at least 1/2. FWIW.