What date are you wanting to see about? I didn't put in a date I just pulled it up under activities, but I just tried for dates in June and july and they pulled up?? getawaytoday.com also has Universial tickets with Disneyland tickets and the dining and it looks like the tickets might actually be cheaper 4 day with 5 day free adult is $288Maybe it is a difference in dates but there are definitely no Disneyland or Universal tickets available when I search. There is a link on main page to purchase either option but then the page itself only offers Knotts, Legoland and other theme parks plus transportation.
I was able to order vouchers tonight with a hotel booking but not on its own. I don't know if you could "book" a room but then edit the order once you have added the vouchers in your cart. I wasn't able to find them without a room booking though, so I wonder if they have changed their policy on the vouchers.