szradm to fire the custom event. This can be automated as a custom script that is executed via the APIv2 call for script execution. Keep in mind that this specific APIv2 call was recently introduced in Scalr 6.1.0 and is not presently available within Open Source Scalr. If you would like to explore this possible solution, please contact us for details on Enterprise or Hosted Scalr which may better serve these needs.
Many thanks,
Wm. Marc O'Brien
Scalr Technical Support