With Sami Hyypia sidelined by an ankle injury and Daniel Agger still to recover from a broken foot, Benitez was forced to pick Alvaro Arbeloa alongside Jamie Carragher for his side's 0-0 draw with Manchester City at Eastlands.
Although a clean sheet suggests the decision worked, Benitez knows the situation is unsustainable over the long term and with youngster Jack Hobbs likely to be restricted to games such as next weekend's FA Cup tie at Luton, the Merseyside giants need reinforcements.
The Liverpool boss is understandably not naming names. But, despite reports owners Tom Hicks and George Gillett would be offering a very restricted budget, Benitez is getting ready to spend.
"We are working to try to find some solutions and we are close to getting some players," said Benitez.
"Until they actually put pen to paper we will keep working with the players we have but we are confident we can get the right players at the right price and that would be good for us."