Philip, my crystal ball is murky.
The tri service requirement and the fact that the buy has already shrunk from the original (the number of air wings that were projected 15 years ago as this program got up and running is larger than the number of air wings now ... ) argues to me that the production run will most likely be the number being bandied about now ... plus or minus a few. If longer delays mean that more foreign orders tank, that's a separate but equally important issue on the economics of the program, writ large.