ignition switch & steering lock Audi 90

[Mark Zvolanek <mzvolane@sydney.ipex.com.au>]

Fellow Q members
Recently I had following problem.
Ignition switch on my 1991 Audi 90 failed so I bought a new one.
During the installation of the switch I noticed the pin sticking out from   
key lock barrel was also broken. Since I could not take it apart I took   
it to dealer for repair.
Originaly I was quoted 1hour labour plus parts for repairing the broken   
pin.
The car was at the dealer for two days, because he had to wait for   
steering lock to be delivered and mechanics had some difficulties to   
putting it all together, so they had to call in a locksmith . In total it   
cost me bit over AUD$530.
I have asked for replaced parts (ignition lock barrel, pin, steering   
wheel lock) and I can not see anything wrong with the steering wheel   
lock. What should I be looking for?
Do all the components have to be replaced when the simple pin breaks?   
Should I be able to get the pin just by itself? Certainly it would be   
cheaper.
Regards
Mark
'91 90 2.3E non-Q 97000kms