I had two different locks for my '73 1200. The door locks are from a Sentra. The ignition lock was lost. The trunk lock was originally from my '72 1200. I took all of the locks out of the car and took them to a quality locksmith. He replaced all of the tumblers and now I use one key for everything. The Sentra key is different but similar enough to work in the old worn 1200 ignition. I only use it to lock the steering column because the ignition switch has been shot for years. That cost me $40 US.
I only get one side of the ket cut though because I have had too many keys break off in the locks. When I had spares made at a local hardware and told the man to only cut one side, he was amazed that cutting only one side would work. He thought that both sides had to be cut. I told him about breaking keys in the past because they were too weak with both sides cut and that the tumblers were only on one side so I only needed one side of the key cut. He said that he learned something new every day.

Mareo