You could try using the Customer Support Contact Form and ask for a copy of the original email. Worked for me once but try to find your order No. for that. It should be in My Account / My Orders / View Order.
I wanted to email tech support but my Sony login, the one that gets me to my account info and software registration, is not accepted. Is there a different account necessary for email support?
What I wanted to tell them is since my Vegas 12Pro is registered that DVDA 5.2 even though it's not listed, that it would prove that I own it.
I wanted to avoid looking through credit card receipts.