I redid mine last year, just tapped it up and out from the bottom with a short screw driver. Took it to a locksmith who cleaned and keyed it for $25. It wasn't the same key blank as my ignition, which I knew had been replaced at some point. The locksmith figured out it took an Austin key blank. If you ever lose the keys and the barrel is numbered, take the number to a locksmith, they should be able to cut you a new one. Mine didn't come with a key, just some alligator clips to hot wire it but it had a number.
The steering lock isn't not much of a theft prevention device, the lock barrel is loose enough to pull it out with the key. I generally park it where I can see it, another + for patios