Good news! I was able to find a new old stock limit switch on ebay. I have received it in, and will be installing it this week. It's funny, the more I work on this machine, the more I like it. The good thing is runout is minimal, and it is in pretty good shape. I want to adjust the backlash a little, possible make some leadscrew nuts for it to take out some of the backlash, but other than that it is turning into a pretty nice machine.