I can just tell you about the parts not how it happened. They are telling you the truth about the bushings are not avalible. I just looked them up and they don't show them seperatley. Also in the film the part has been superceded 3 times to a newer number. There is a note in the film also that says up to vin number A743532 only replace in pairs. This means if the last seven of your Vin number is before that A743532 you must replace both of them to the newer style. After A743533 they came updated already. I know this is not what you wanted to hear but if I were you and my car was before that vin I would try to get the dealer to do it under warrranty since you have the earlier version control arms and they know they had a problem by superceding the numbers. Good Luck