The appeal comes on the 15th anniversary of Peter Falconio's death while travelling through the outback in Northern Territory with his girlfriend, Joanne Lees.
The pair were ambushed by drug runner Bradley Murdoch as they were driving along in their VW Kombi.
Mr Falconio, 28, from Huddersfield, West Yorkshire, was shot dead on the spot but Ms Lees managed to escape.
After hiding for hours in thick bushes, she managed to hail down a passing road train but the only sign of Mr Falconio was a pool of blood in the road.
Murdoch, who is serving a life sentence for the killing and assaulting Ms Lees, has refused to say what he did with the body.
He denied the attack but was found guilty in 2005 after a speck of his blood was found on Ms Lee's T-shirt.
Acting Deputy Commissioner Jamie Chalker said the case was still open and detectives would welcome any new leads.
"If anybody has any information as to his whereabouts, please come forward," he said.
Mr Chalker said the case continues to fascinate the media and the public, leading to new avenues of inquiry, some which are more reliable than others.
"Recently there was another media expose in respects of locating an item that was believed to be linked to Mr Falconio, but further investigation showed the item had no linkage whatsoever
"What we're hoping is that at some point in time we still do get calls around skeletal remains in particular, if people happen to stumble over them by happenstance."
He added: "Australian law enforcement has a history of many cold cases where somebody finally has the realisation that they themselves may not have long left on Earth and make the decision to impart information that they've held onto for a very long period of time."
This news has been published by title Appeal To Help Find The Body Of Murdered Brit
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