Rear Control Arm

About a month ago I got my car towed to my trannmission guy, when the car was towed the front right control arm got twisted and the drivers side rear controls actually got turned into the shape of a U from the hook(The battle is going on right now with the tow company to pay for the damages). Anyway my question is there anywhere I can get the rear control arm and the bolt set from somewhere other then the manufacters because everyone they send to my mechanic has been wrong and no its going on two weeks its been in the shop for just this. Other then going to a junkyard does anyone know a place where I can get one? As always thanks for any input.