Metro301, they actually called for full Saudiization of the FO's in the late 90's in response to a complaint from CPL holders, they succeeded in reducing the number down to 10, 9 of these were on the 747 Classic.
Right now I believe that the only fleets with expat FO's are the 330 and 777, so how long will it realistically take to replace them?
Captains are a different story, with about 50 upgrades a year, they are barely covering retirements let alone fleet expansion.