Police are still working to locate the missing parts of Mr Mills' skeleton.
Last month his mother, Lichelle Mills, said she did not mind how long it took for her son to be returned to her - as long as it happened eventually.
On a Facebook tribute page set up by Mr Mills' brother, he revealed that memorial patches were being made. "Some funeral arrangements have been in talks but we still don't know when we will get him back home. We've ordered some memorial patches. Will post them up soon for you to see," he wrote.
"Also if you guys have any ideas for the funeral, feel free to share - any music, etc. And if anyone would like to speak on the day just let us know - we would actually really appreciate it ... we want to make the day a 'celebration of his life'."
In court yesterday Cooper's lawyer, Mina Wharepouri, reiterated that his client intended to plead guilty as soon as possible to the charge relating to the cover-up of Mr Mills' death.
At an earlier court appearance, Mr Wharepouri said Mr Mills' death was an "unforeseeable unintended event which was caused by the victim's loss of control and violence". Cooper would plead not guilty to the murder charge as he was acting in self-defence, the court heard.
Judge Lawrence Hinton yesterday remanded Cooper in custody until his next appearance at a post-committal conference, also via audio visual link, on August 23.
He declined media applications to photograph Cooper in court, saying doing so could affect his right to a fair trial.
He also refused to allow access to the police summary of facts, which outlines the charges against Cooper and has been filed in court.