They're probably all gone. I got the Entertainment rate for a standard room of $117 for Nov 29 - Dec 2. I booked it back in February and then added on a night twice since then but that still was awhile ago.
There's also the Universal Fan Club discount, but you'd have to get a hold of one of them. They are free from people's work or sometimes a website or sometimes if you email Universal they may send you one. You could ask here where to get one. Or even before you bother getting one, you could call and see if they are even offering discounts anymore for the Fan Club.
Good luck.