Jimm 7/25/2012There are four ball joints; on each side (right and left) there are two; front upper and front lower.
Try the many on-line auto parts sources, such as; www.RockAuto.com or www.autopartswarehouse.com for the replacement parts. For example, they (RockAuto) list the front (left or right side) lower control arm with the ball joint for around $30.00 each. The front upper (left or right) are around $43.00 each. Each of these control arm assemblies come with the bushings.