It's not going to happen. Poland is already lining up. Soon other countries will follow. And Middle Eastern countries are aching to buy F-35, only if they can...
Here's a graph of the F-35A unit cost from LRIP 1 to 10. Note that for LRIP's 1-9 the quoted cost did not include the engine.
LRIP11 F-35A's price came down 5.4% at $89.2M. LM is rargetting $80M for the next batch.
So from the first batch of F-35A was ordered the unit price has already dropped by 60%. That's a lot.
The sustainment cost on the other hand is targetted to be $25,000 by 2025.