I was thinking about you when I read some of the Sticky threads at the top of the forum yesterday.
Galaxy1012 has posted a link to this
http://bianj.org/websites/bianj/imag...rommildtbi.pdf
from Brain Injury Rehab Services,
Burwood Concussion Clinic,
Canterbury District Health Board.
I think Canterbury is on the South Island, but they may have information about someone you could see who is closer to where you live.
p.s. I guess Canterbury is Rugby and concussion capital of NZ?