ProForms hidden values

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I am posting here because there appears to be no help from the ProForms support team...

I have a hidden value in a form which I want to reflect the page_url. It works fine and the client gets sent an email with the page that it was sent from

/products/?product=R111F

but I'm trying to get the FULL url to show in this link. Currently, if you click on this link in the email, it doesn't go to the website...

Is there anything I can do here to replace the page_url handle in the ProForms setup?

Thanks

rc255