As far as I know, Expedia is not one of the "wholesalers". They access the same inventory as Disney's CRO. It is unusual for Expedia (or Travelcotuy) to actually have a room available if CRO is showing no availability. You usually get the same message as skiwee1 just did. The Disney inventory is very dynamic though, so it does happen every once in a while.
As far as a cash ressie for OKW for nextt July, I'd be very surprised if any were available this far out. OKW is DVC resort and is completely sold out to DVC members. Disney owns/held back only a very small percentage of that resort - about 4%. That % is often used for rehab/maihntenance purposes, but can be rented out for cash. Most of the rooms available for cash rental come about because DVC members have traded their DVC points for a non-DVC option. DVC has to rent out the equivalent of DVC rooms to "pay" for the member's trade.
Don't give up on OKW for next July. More rooms will become available closer to the date. A good time to try is about 6 months ahead of time and then again at 2 months out.
Good luck!