German/ Russian languages exchange (Moscow)

I don't even believe myself, but after years and years using English for the most purposes ever, I must admit that my German is fading away (which is my first foreign language!). So I would like to find German speaking people interested in exchanging German/ Russian or maybe just polishing their Russian. When it comes to Russian, i am a very pedant "teacher" (doesn't work on my boss, though). I mean, I don't need lessons in German, I just need more practice. Even work seems to be not enough...
Anybody interested? Would be cool!