I have recently started driving my 122 as a daily driver after months and years of work. Some of the last things to do were keys to the doors and trunk. I work on a golf course as a mechanic and we have probably a hundred old keys in a bucket from equipment and locks from days past. While I was waiting for a reel to grind out I decided to start trying keys in my door locks after about 30-40 keys I found one that worked, it opens the door and trunk also locks it from the outside. The key fits perfectly no slop or jiggling just feels like it belongs to that cylinder. This saved me the expense of new locks and the work involved.

For anyone's information in the same dilemma the key that fit was from a older gm door lock, it fits perfectly.