I was looking for biz/first on MXP/JFK for Nov, 2013 on Delta via AKA points. I had the outbound, and had paid the full RT biz points, because had biz on the last leg home. Obviously, the trans-Atlantic was the part I really wanted to be in biz/first.
A CSR for AKA suggested calling daily, starting about 2 months before the flight. So, I did. At 7 am for me, it's 5 am for them (located in Seattle), and the partner desk CSRs open for business then.
We became friends, as the same two or three people work that desk. Finally, about 4 weeks prior, and 1 week prior to me leaving for Italy, there were some seats in biz/first. Having taken the time to call, and be pleasant every time I was told "No," I had become someone they were willing to do extra work for.
The seats showed in their system, but they couldn't book them, for some reason. They said they would keep trying, and I should call back in two hours. I did. They still had trouble. Said to call back in two more hours. But, before I could do that, they called me; the seat had been reserved.
Now all that was needed was to upgrade Husband, booking with Delta miles, for his seat. This, of course, was a much easier process, as it was Delta metal.
Two center row seats in Biz/first. Ahhhh. Worth the time, and the best way that I can think of for you to find the seats you are looking for. Start calling, daily, NOW. Be sweet and kind. Call early in the morning, before they're tired and cranky. Be prepared to have to call for the return trip while you are in Europe; I've done that, too. So have the international number ready.