Roughen both sides with rough sandpaper to give the glue some 'tooth' and lay in some J-B Weld.

Gorilla glue might foam, sometimes it does, sometimes it doesn't, but if it foams out all over the place you can wipe off the excess with alcohol, less likely to damage the plastic than acetone, or you could let it dry and scrape any excess off.

Be sure to coat anything you don't want the glue, epoxy or Gorilla, with petroleum jelly.