The 31-year old striker has been starring on loan for Ipswich Town with eight goals in 12 Championship appearances but Redknapp is planning to bring him back to Loftus Road in January.
"I wish he was here now," Redknapp told TalkSPORT.
"He would be more than useful. He gives everything and has done very well at Ipswich. I wish he was around for us at the moment.
"We need all the bodies we can get. If he comes back I am sure he will do well."