At Spurs, Eidur Gudjohnsen arrived on a free in January and has proven an able stand-in for the injured Jermain Defoe, scored in each of his last two games.
Winger Niko Kranjcar cost just £3million while £5m defender Younes Kaboul ensures the loss of injured Sebastien Bassong will not stop their fine run of form.
Redknapp said: “You can find players. They are some out there. I took Kanu off the park when I was at Portsmouth. He was not playing. He was training on his own.
“He didn’t have a club four days before the league started. I didn’t have a second forward.
“I am sitting there and thinking ‘Where has he gone after he was a free at West Brom? They said that he had gone nowhere, so I tracked him down and got him in.”