If the lock is in the dash, then it's exactly like the one on my AD. The pic I posted indicates the lock is the same from 41-53.
You don't need the key to remove the lock from the dash, but would to remove the cylinder. Or a good lockpicker.
To remove the lock, you may have to remove the glovebox cardboard to get access to the screw I mentioned. Once you have that removed, it will be fairly easy.
The key should be the same as the key for the door. If you don't have one, you can still get the key code and get one made by a locksmith. Remove the door lock and look for a 4 digit code stamped on the lock mechanism. The lock should be held in place by a metal plate that slides in behind the door skin and behind the weatherstrip. Pull that out and the lock can be removed.
If you'd like, after you find the code, PM me with that and I may have a key that would fit.