He hopes to raise more than NZ$22 800 for the Violet Foundation which promotes meningococcal awareness, which would top the successful bid for the handbag used by legendary All Black Tana Umaga in a bar-room stoush.
All Blacks doctor Deb Robinson says she's been told she is the envy of every woman because she helped put the replacement jersey on, but Williams said he copped plenty of flack from the team for his topless cameo.
"More so from Benny Franks. I think he's little jealous. He thinks I'm all show no go," he quipped during a press conference.
Burly prop Franks, sitting next to Williams responded: "Now, he rings me up every morning to go in and help put his jersey on."