Detectives investigating the disappearance of Melbourne mother Karen Ristevski have dressed a mannequin to resemble what she may have looked like the day she disappeared.

Police have created an information caravan in Mrs Ristevski’s home suburb of Avondale Heights, with the hope of generating new leads.

Earlier today, detectives went door-to-door in the neighbourhood and put up more missing persons posters.

"We hope it jogs people's memory if she was seen by anybody in the area leaving the house,” police told 9NEWS.

The 47-year-old was last seen leaving her home to "clear her head" after allegedly arguing with her husband Borce, and has not used her phone or bank accounts since.

A mannequin has been placed in Ristevski's home suburb of Avondale Heights. (9NEWS)

"The longer she remains missing, the more difficult it becomes,” police said.

Police are yet make any arrests. Mrs Ristevski’s husband, Borce, has been interviewed and remains a person of interest.

"We're not going to speculate on any individual at this stage,” police said.

Mr Ristevski has reportedly stopped cooperating with police.



Last week, it was revealed that officers from the Missing Persons Squad had interviewed Mrs Ristevski's stepson, Anthony Rickard, who is co-operating with police.

The 32-year-old reportedly provided credible information about a history of conflict within the family.

Mr Rickard has denied any involvement in Mrs Ristevski's disappearance but told a newspaper his anger over a family conflict did provide him with a reason to want to hurt her.

He admits battling an ice addiction and said Mrs Ristevski had previously spoken of planning to leave the family.

He also said he phoned Mrs Ristevski about 10 days before her disappearance to discuss the family ­conflict, which he said has been "swept under the carpet".

Mrs Ristevski's husband was the last person to see her alive and has been interviewed by police and released without charge.

He said that his wife would sometimes walk off from their house to cool off after an argument.