I have a different idea. You'll never walk alone is a good idea, but as you say, it's not our chant. Might I suggest something that is us and well known:
Tūtira mai ngā iwi,
tātou tātou e
Tūtira mai ngā iwi,
tātou tātou e
Whai-a te marama-tanga,
me te aroha - e ngā iwi!
Ki-a tapa tahi,
Ki-a ko-tahi rā
Tātou tātou e
(Repeat)
English Translation
Line up together people
All of us, all of us
Stand in rows people
All of us, all of us
Seek after knowledge
and love of others - everyone
Call ourselves one people,
And stay united.
All of us, all of us
It was written "for all peoples, regardless of race, creed, beliefs, political stances, it was there for all people to stand as one"