"Les Munro's decision to give up his prized medals and logbooks to support the Memorial that honours the Bomber Command mates he lost in the war is an act of extraordinary generosity," said Mr Goff today.
"As the last surviving pilot from the famed 1943 Dambusters Raid and the survivor of 57 bombing sorties, Les Munro is one of New Zealand's most distinguished war veterans.
"It would be a tragedy, however, if his medals were lost to New Zealand because they were purchased by an overseas buyer.
"The Government should take the initiative and purchase the medals and logbooks so they can be put on permanent public display in our country."
The move would be a fitting tribute to both Mr Munro personally but also to the 1851 New Zealand pilots and air crew who died during WWII while serving with Bomber Command, said Mr Goff.
"This year we mark the centenary of the occasion which gave rise to ANZAC Day, the day we commemorate all those who served and those who died for our country. Purchasing the medals would be an appropriate commemorative action," he said.
"The expenditure of around $100,000 is a small price to pay for retaining the medals as a lasting memorial to those who died over Europe to protect the freedom of future generations of New Zealanders."
David Butts, the ministry's manager of heritage operations, said officials spoke with Mr Munro yesterday.
"We have talked to Mr Munro about the steps we are taking and will be keeping him fully informed," he said.
"Protected New Zealand objects are a valuable and significant part of our culture and heritage and it's our role to ensure this is considered before they go overseas."
Mr Butts said the situation will be clarified "well before" the auction.
A spokesman for Sir Peter Jackson, who has been working on a remake of The Dam Busters since 2008, refused to comment on the sale, or whether the famous New Zealand film director would himself bid for the medals and bring them back here.