Hey there,
it isn't too hard, and I can get you new parts, in the US for good prices.
You will need to remove your steering wheel, then remove the panel under the dash, as you are going to drop the steering column a bit.
The remove the instrument cluster, it will just pull out then remove the connections on the back of it (when you put it back together do not start the car until you have reconnected the oil line to the back of teh cluster).
Then loosen the clamp around the steering lock, and the two bolts that hold the steering column up.
Then you will need a dremel or similar, with a small grinding stone attachment, and you will grind away the small button that is holding the steering lock assembly into the sleeve that comes out of the steering column. When it is ground down, then you can manipulate the steering lock out of the steering column (you may need to pull the ignition switch off the back before you can move it too much.) then you are set to install your replacement.
Let me know if you need pricing on replacement parts, or more info on the job.
If you do a search on the diesel giant webiste I'm sure that have photos of the procedure.
hope this helps,
Foto