some good tips from malcolm there, i like the vibrating tool idea, lateral thinking.
i have removed many of these, the broken part is usually just the barrel so if it could be removed it`s cheaper than the whole assembly. the method is to grind away at the periphery of the black collar until the face of the barrel can be removed (you will probably find it is already sheared), a 1/4 die grinder with carbide bit is ideal but i`m sure it could be done with a cutting disc in a dremmel. then just remove the guts of the barrel till all the levers are out and turn to position 1, insert tool and bingo! i can do one now in less than 45 mins including removing all the swarf! dust sheet needed and masking around instruments etc. biggest thing to go wrong is grinding the dash surround away instead of the lock - be careful!! obviously you will need a new collar as well as the barrel.