You can get the URL for a Pushpage Issue through the Pushpage task in School Website.

As a Pushpage Manager/Editor:
  1. Navigate to School Website
  2. Select Communication > Pushpage > Pushpage Issues.
  3. Filter for your Issue and click View to update results.
  4. Click the View Issue link.
  5. The URL in the address bar here is the URL for your Pushpage Issue.