Forgot email to old account

[Srgnt Cereal]

I know that I should use steam support for this, and I have, but that ticket thing is so damn useless. I have both the correct username and password for my old account, but I forgot the email I used. Steamguard sends a code to that email, and I need that code to get onto the account. Problem. i can't get the code because I don't know the email. Anyone know how I could get the email address that was used with my old account?