The broken ignition switch linkage is discussed in several threads around here. My daughter called one night frantic because my car would not shut off.
The general opinion expressed in the other threads was it is easier to simply swap the entire column. That was the route I took, and I haven't regretted it.
I've only removed undeployed airbags from steering wheels, so I do not know if there's anything special to do for a deployed one.
btw, don't feel bad about the spare column. I eventually bought another one of these cars, so I picked up another column from a pick-n-pull when I spotted one in good shape for cheap. I still have the original column with the broken linkage, swearing that I'll fix it, but probably won't. Until then, I have two steering columns standing up in my office behind my office chair.
Don't even get me started on why I have two complete sets of seats sitting with them.