UPDATE: Now solved, didn't know there was a wait time before those went on sale also. Thanks all.
[original post: I have scoured the website and can't find this. I really don't want to get in a different line after collecting my stuff from Will Call just to buy one generic.]
You'll need to wait until they go on sale sometime today.
Alec Usticke, Fans of Gen Con Facebook Group
I'm told generic tickets will go live in about 15 minutes, shortly after 2 pm eastern.
Gen Con LLC
Thank you both!
The button to buy them is just below the Find Events button.