Seizing alignment bolts are parts is common depending on your climate. Up here in Canada i have had to replace front tie rods and lower control arms, also i have changed the whole rear suspension include the upper and lower control arms and toe links because everythign was seized. Most of the time you can't just change the bolts because the bushings are all torn and the bolts will just spin in the bushings. This is not a cheap job but once you change it once you shouldht have the problem again as long as your mechanic puts on anti-seize.