They are loaded into Worldspan now. Therefore I think ITN should have them. In addition to ISP-MCO they are also offering the fare out of JFK. Although, in order to secure the JFK fare it appears you need to route via ATL.
The fares are any day of thw week with a one day minimum and a 30 day max. Its a 7 day advance purchase with all travel completed by 10/26. The fare code is L7M1A53.