Unlocking Macchi MC. 202?

[Soviet Ace]

I've been flying the Sicily campaign, but I don't seem to be able to unlock the Macchi MC. 202. Anyone on the campaign unlocked it yet? If so, please tell me how. I'm really starting to get tired of trying to unlock it, and would like which mission it is that you unlock it. I have silver in everything besides the second one, maybe it's the third mission? Anyway, anyone with the know how to unlock it, please post here. It will be VERY much appreciated.