http://www.asisbiz.com/Fw-190A.html 
correction, this is a A5.
Wasn't sure about the A7's.
I have seen the A6's on A5's though. 
A-7 was all but an A-8. Only a very small number were built and the production was switched to A-8s. It has the 13mm cowl bulges in the pictures, so you can tell it's a better match to put it on the A-8 we have in-game.
A-4, A-5, and A-6 were all very similar to each other, the A-6 being the only one that could carry MG151/20s outboard, but otherwise armor and performance and capabilities were the same.
So, A-7/A-8/A-9 would go on our in-game A-8. A-4/A-5/A-6 would go on our in-game A-5.
Mus:
Not sure I like your colors. Sometimes you've pulled of very good effect with high contrast colors, but you're making RLM02 come off as barely any lighter than the blackgreen it borders. I think it's gone too far into the high-contrast zone. I think there's too much noise/streaking as well, which makes the colors even darker yet.
I know you said it's a WIP and it's subject to change, but looking at the screenshot that's my first impression.