Do what George said. While you are waiting for the RCM to come back, order one of these:
https://www.germanautosupply.com/mer...ensor-400.html

If you don't need it, keep it in the trunk for when it DOES fail. If you do need it, order another one as a spare as soon as you use this one.
I've carried one for over six years, used one on my car and one on a friend's car. The Crank Sensor is prone to failure and it not easily obtainable locally.