The Rs manager has targeted temporary deals for players from across the Atlantic, including LA Galaxy's Robbie Keane, as potential January additions to his squad
However, the 65-year-old may have a limited budget at his disposal after Tony Fernandes already invested large sums in former manager Mark Hughes' underachieving squad over the summer.
Redknapp will look at loan deals for MLS stars keen to return to England during the American off-season. Former Everton stars Tim Cahill and Landon Donovan are among those mentioned, but former Spurs striker Robbie Keane is top of the QPR manager's list.
"The MLS market is one that we've got to look at," Redknapp told Sky Sports.
"Robbie's a good shout. He probably would be an interesting player.
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Another former Spurs man who could be available is David Bentley. His loan deal at Russian side FC Rostov ends in January.
"Bentley's a good player," Redknapp added. "It shows that he must have wanted to play football to go to Russia so credit to him.
"He could have stayed and took his money but he's gone out to Russia. Dave's a good footballer - I haven't had problems with him."
The west London outfit are still without a win this season and are rooted to the bottom of the Premier League table.