If you cant get Martin Skrtel, try to sign Ivanovic for the defense. One young decent german defenders is Fabian Schönheim, who become national team. He plays for Kaiserslautern in the beguining of the game.
For the keeping try Marcelo Grohe with german nationality.
For the wing back you can use Ivanovic, as I said, and for the left you can try Ivan Obradovic.
For ST you can try mike hanke, good quality with high heading values. | 
