LBC, I STILL have not gotten my fiberglass eyelids painted. What's the purpose of the flex agent? To prevent paint chipping when they are curved and applied?
And to answer the originaly question, I got my eyelids for my 05 Sedan on
http://www.body-kit.com. They don't currently show any product available for any Altima after 2006, but you have to e-mail them for part availability and pricing anyway. So, I would ask them if they have anything available - it's a piece of cake to make them, so they'd be foolish to turn you away and say they can't make them for you.