Olivier Giroud struck twice in yesterday's FA Cup win at Brighton.
"Quality-wise no, number-wise, we could be a bit short maybe. Gervinho is not here at the moment. We have Walcott, who can play through the middle and then of course Giroud," said Wenger.
"You do not find them in the street, the strikers that can play for us and strengthen our team. It’s difficult in January."
Asked if he had bid for Fiorentina attacker Stevan Jovetic, Wenger replied: "No."