Prime Minister Julia Gillard has extended an invite to the group of three returning independent MPs for a meeting with NBN Co chief executive Mike Quigley. The move is meant to appease the trio, who continue to demand for more information about Labor's National Broadband Network policy.

Currently, the independent MPs, Rob Oakeshott, Bob Katter and Tony Windsor, are in the middle of negotiations with Labor and the Coalition who are both courting their support to form government.

In a letter addressed to both parties, the independent MPs requested for access to information under the Caretaker Conventions from various government departments. Their demands include a briefing directly from Peter Harris, the secretary of the Department of Broadband, Communications and the Digital Economy.

The trio also requested for briefings from a number of ministers and shadow ministers including Communications Minister Stephen Conroy and Shadow Minister Tony Smith.

Gillard said that she would be offering assistance towards granting the requests. "With respect to your keen interest in broadband, would you like a briefing with the chief executive office and director of NBN Co, Mr Mike Quigley?... He would be best placed to provide you with the technical information on aspects of the NBN -- including the roll-out and other information you may be seeking," said Gillard.

The move comes as Windsor made comments that he didn't believe the $43 billion cost estimate on the NBN policy was accurate.

"This $43 billion figure that gets bandied about -- I haven't seen the real trail that ends up with that number, and in fact I think it's a fictitious number... We want to find out what the real one is, and there should be a trail that leads us to that," Windsor said.

The group of independents has previously indicated that telecommunications would be one area that it was particularly looking at -- with the privatisation of Telstra having been flagged as an issue.