The 3025 'is' the aviator, and if its an aviator you want, definitely go for the 3025. Ray ban do a couple of different models, but not as good as the classic.
The 3025 only comes in three different polarised lens colours: Crystal Green (which is the G15), Crystal Brown, and a Pink Gradient. None of these are that reflective from the outside in, youll easily see your eyes behind them unless youre about 10 foot away, especially if the sun is hitting them, youll see right through them.
The second problem youve got, is that if it is the gunmetal frame you want, there isnt actually a gunmetal 3025 with mirrored lenses either. If you definitely want something that your eyes cant be seen behind, then you want to go for mirrored. You can get the 3025 in a silver (its pretty dark, basically gunmetal) with a pretty good dark grey mirrored lens (doesnt look shiney when looking into them which is a great bonus) it just looks dark enough not to see them. Or, there is a black frame, with an awesome grey/green (almost G15) mirrored lens, again not polarised, but looks like the G15, and you wont see your eyes behind.
If you definitely want the polarised lens over a mirrored lens, then the 3025 probably isnt going to be able to do the job for you im afraid, but there are a few I could probably recommend (They wont be similar to an aviator unforutnately though)