I have the .key fix for the NEX 4000, 4100, 5000, 5100, 6000, 6100 for password lockouts.
You can verify my ebay feedback which is 100% and I deal through paypal. If you are local to the Philadelphia suburbs I can even do it for you in person.
I spent hours trying to find the fix to my used NEX 6000. Fix it today for $30. I will email you the file and the instructions.