Automated Export of Campaign Registrants to Excel

I want to have my campaign registrants to automatically be added to an Excel spreadsheet that is shared amongst my shareholders for the project. I am trying to integrate with Zapier, but for some reason, it will not allow me to search for the specific campaign. Is there a reason that Constant Contact doesn't allow data to be sent to a "live" sheet? Is there a way that I can add a collaborator to a specific campaign, allowing them access to my RSVP list? The person is not within my Constant Contact team network.