He was going to pass the messages on to the men this afternoon.
But nobody had called with information about the identity of the attackers.
Both of the travellers suffered minor injuries and one was punched in the face a couple of times, Mr Brazier said earlier.
"This was a nasty robbery with aggravating features of two innocent, defenceless young guys by two criminals who we need to find before they do it again. It was a completely unprovoked attack on these two young guys which has left them traumatised and now reconsidering their visit to New Zealand.''
The tourists were able to write down the black, four-door sedan's licence plate number - ZR9879 - as it drove away, but police say those plates could have been removed by now.
The French Embassy in New Zealand was helping to get them replacement passports and documents.
Mr Brazier said police would like to hear from anyone who saw the hitch-hikers being picked up or dropped off, anyone who saw the vehicle or knows where it is, or anyone who knows where the offenders are.