35-year-old Scott Maitland and 33-year-old Cindy Masonwells were last seen when they collected their newly restored Holden panel van from a Bungalow vehicle workshop on the night of Thursday July 5.
They were scheduled to attend a function in Cairns the following day and failed to attend as planned.
Police hold concerns for their safety and well being as they have not contacted family and friends which is out of character.
The accompanying image is a photo of the actual vehicle which was taken prior to final assembly.
Listen to Detective Senior Sergeant Ed Kinbacher and Mr. Wayne Maitland (father of Scott Maitland) discuss the case:
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Anyone with information which could assist police with their investigations should contact Crime Stoppers anonymously via 1800 333 000 or crimestoppers.com.au 24hrs a day.
Crime Stoppers is a charitable community volunteer organisation working in partnership with the Queensland Police Service.