I also wouldn't count out Crespo yet, he has ont played much and a little bit of lcuk could change things and give him the needed confidence.
But the Inzaghi situation is troubling and it is slowly turning into another "Van Basten" saga.
He have been on and off often now and almost only off. IF we are thining January then Tevez is surerly the name, but doubt Galliani want to splash out that much.
Then the name of a very interesting option came to my mind. Morientes. He is proven, he is unsettled and unwanted by his club and would therefore come cheap. We have good relations with Real and he can be bought. Only problem is that he is cuptied.