Okay, Costco has redemption. I joined again last night and immediately called and spoke to a very friendly agent. The original price she quoted was considerably higher than what I paid. However, she remembered I said I had a reservation booked already and contacted Disney to make the transfer. We saved $524.00 on an already reasonable price for the 14-day FL to CA repositioning cruise. $45 well spent and two outta three Reps were very nice. The second girl just needed a break apparently.
Now, I just wish I could score a room credit. Unfortunately Disney Visa doesn't have an offer that extends until next year, because I certainly plan to use that card to pay it off!