TP doesn’t maintain a DLR reservation finder like they do for WDW. We’ve always had better success calling for DLR reservations when there isn’t availability online. Also, if you are on-site, there are a certain number of certain reservations set aside for just on-site guests, so if calling you can tap into this perk. Lastly, if you still haven’t got a reservation at the time trip, there are reservations that people hold onto unsure if they will use & then cancel last minute (which is the day before). You can check for an ADR the day before & possibly even day-of with some hope of success.