Thats why I asked, Shag.
I was figuring that he meant trailing arm. Because if he managed to break the other stuff back there - he must have been off-roading or something really crazy!
Anyhoo, I've replaced mine before when I twisted it out of whack.
I just got the car up on the lift and took a wrench to the thing. A couple of bolts later, all done.
I think the part was like 4 / 8 / 12 bucks. My memory is kind of hazy - since it was a few years ago, but I remember it wasn't much