You should reach out to your account manager to see if they can get you a trial license for Publisher. Please note though, you should not apply this in your production environment that is likely running the Reload Engine currently, as it will convert all those task such that if you decide not to purchase, you would likely have to redo all of your tasks... At a minimum, you would need a backup of the QVPR prior to applying the license, and if you then choose not to purchase, you would need to follow the steps in the following article to remove the license etc...
How to Remove Publisher license
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