I have a 1 1/4" drain on my bathroom sink. It goes into the wall and soldered on to a cast iron elbow. My chrome pipe is leaking and needs to be replaced. What alternatives do I have besides tearing the wall down to repipe?

Show us a picture of this please.

Yes, I think we'd like a pic since you can't solder to cast iron. I think you may be mistaken with your materials.