Hi Russell,
Thanks for reaching out! With the PDF Tickets extension, the PDF is also available from the attendees page. So, you could grab it from there if you needed to send it out in another email.
If you are trying to include this in another email automatically, then this would require a customization. Customizations are outside the scope of support that we are able to provide here in the forums, but please let me know if you have any questions (or if I’ve misunderstood what you’re looking for). I’ll do my best to point you in the right direction!
Thanks,
Jennifer