I've updated the Google Scholar widget we use in LibGuides and other places so that it automatically uses EZproxy. This means that the 'Find It @ JCU' link will appear regardless of whether the user has set their Scholar preferences to show JCU's openurl link resolver.
I tried this in the past but found that form inputs wouldn't pass through from the form through EZproxy to Scholar. But Helen Hooper raised the issue again so I took another look and found OCLC has instructions for allowing a form to use the ezproxy prefix in a form action.
Even better is that because the master code is stored in a LibGuides content box, and our LibGuides link to it AND because the gadget code I distribute is called from LibGuides I've managed to update all instances of the code with one edit. Chuffed.