How about the Sherbourn 7/2100A; seven mono-blocks in one chassis. It's a heavy beast, though. I using it with my AVM30, using the balanced inputs, with good results. It has two power cords because it draws so much current. Another alternative is the seven channel Anthem which is less expensive than the Sherbourn. There's no used Sherbourns or Anthems available here know, but the do pop up from time to time.
Good luck,
Good luck,