I just discovered that apparently the ignition switch was changed on my 1964 Fury not long before I got it. The key that came with the switch works the switch just fine, but has no effect on the door locks. That key (and the trunk key) are all that I got with the car, and now the previous owner is long gone.

Can I do anything with the door or ignition locks to get the key to work on both? Or will I just have to get new door locks and carry two keys, and if true, where to get new door locks? Thanks!