Hi Patty,
When the going gets tough, try Mark
GPN Artificial Disc Replacement ADR. He has worked closely with both doctors. Mark is an ADR, spinal patient advocate. Among other things, he can smooth out some of the wrinkles and though you can contact both doctors direct, your urgent situation sounds like it requires some intervention.
Dr. Bitan is also an excellent doctor but you'd also have to pay out of pocket for the surgeries in Germany, though usually much less expensive. Either way, I'd run to the phone to contact Mark. The man is truly a miracle worker (I speak from first hand experience).
Dale