Good on you, David - you clearly relish a challenge.
I was surprised by the (rust) condition of the vehicle - it seems to be in very good nick apart from the rear seat base, which won't be too hard to repair. I think my blog describes the repair I did on my seat base.
I was also surprised that the vehicle started so robustly on 12v - could the starter motor have been re-wired ?
Good steering wheels though, are not that easy to find. Almost everything you need can be obtained from the UK spares folk - though you'll pay a hefty price, if you need their stuff. How was the steering wheel on the second Champ ?
What is your plan to repair this vehicle - will you start on it straightaway ?
You might want to check the Champ Owners Club site, which includes a rudimentary forum
http://www.austinchamp.com/
I looked for your vehicle # here ...
http://www.austinchamp.com/03%20Regi...dex/CT2001.htm
... but couldn't find it. If you get in touch with the forum organisers, they will be happy to add both numbers to the list.
If you need any help, let us know - although you seem to have made a very good start.
Jack