The Rs are prepared to meet Diame's £3.5 million buyout clause.
Redknapp said: "Diame's a good player, too. I'd love to have him here but he belongs to West Ham until they decide if they want to sell him.
"I speak to them [the QPR board] every day about who I want, we go through the list and see if there is anyone we can find. We will come up with one or two before too long.