If you call Disney, you can still add that option. I called them just to see since I couldn't find it on the new site and it wasn't a problem. My Dad was also able to get the no expiration option through AAA yesterday, and according to a few others I've spoken too, the option is still available at the ticket booths at the parks and at the ticket desks in the hotels.
I'm not sure why it's not on the new site, but for now the option is still available via phone or at the parks.