Redirect page and referrer

Great plugin, congratulations! I would like to use your plugin in a scenario where someone visits a page on our website that no longer exists, for example: https://www.example.com/offers/dog-leash/, and they are automatically redirected to https://www.example.com/page-not-exist/ where they can fill out a form. At this point, I want to use the referrer to determine which page the user initially tried to access, so that in the email it shows https://www.example.com/offers/dog-leash/, the URL of the non-existent page. Is this achievable with your plugin?