Hmm...Sounds like you are up for replacing both of the arms.
Unless you can find just the boot somewhere, then you could probably change just the rubber priece. Getting a used control arm would be a pain as well, since you are going to end up replacing the bushing.
Originally posted by Autotechnica
It's the inner rubber boot then, the one closer to the rear end of the car. Anyways, how bad is it? Compared to the passenger side one which looks next to perfect condition, the driver side one looks like someone took a rusty knife and stabbed the sh*t out of it.. hahah. Another words, pretty bad.