I bought one from Larry's. It has a tool on each end. One for the light switch (others too) and the one for the ignition. Grabbed it with vicegrips to make it easy to use.
I just changed out my ignition switch. Bought a replacement made by Standard Parts at a local parts store. "Appeared" to be the same but not true. After much difficulty trying to get front bezel in I took all the wires off again and really looked at the original and the new one. After close examination they were not idenitical but with a small grinder I was able to remove a small section of the new one and it worked fine off the car. Putting it in the car was another story. No matter how hard I pushed in on the spring I could not get the bezel nut to go on. Finally I slightly chamfered the 2 tabs on the bezel and it went right together. The lock mechanism changed easily once I figured out it needed to be on "start" to come out.
Also my switches "acc" stud was not very long and I had to extend it with a 3/8" long piece of 1/4" tubing I tapped for a 10-32 then added a lengthof 10/32 all thread......Good Luck