By reaching out to people on Facebook, running various auctions on Trade Me and receiving kind donations from strangers, his family and friends earlier had managed to scrape together $21,000.
His Napier-based mother, Nadine Mouritsen, said she was keen to know more about the mystery donation, which enabled her son to leave the Thai hospital she described in earlier reports as "pretty grubby''.
"He was cleaning his own wounds there and stuff like that,'' Ms Kenzie said.
"I was a little bit skeptical because it was a lot of money but when I found out it was true I was like `Wow that's just amazing''', she said. Her son was in a stable condition at Auckland Hospital and required urgent surgery on his jaw.
He still owed $12,000 of outstanding medical bills in Thailand.
It was hoped Mr Kenzie's girlfriend, Amy Myles, would also fly over for the reunion.