Teretonga Park and the Tasman Series

I'm recreating Teretonga Park as it was in 1967/68 for Grand Prix legends sim. Can anyone help out with track dimensions, cambers, contours, location of ditchs and banks, etc. or any other information on the physical layout to get the track as authentic as possible? I have a flat basic layout done from an aerial photo but would like to get the bumps and cambers as correct as possible. Any pics would also be greatly appreciated. I have scoured Sergents and Tasman-Series.com for information already. Thanks to anyone that can help

Good starting point would be Jenkins and Associates - civil engineers - Invercargill NZ.
I am sure someone on their staff would know where to direct you to.
Used to be a good bump where the concrete grid met the track at the start line about that time!

Thanks for that...in 1968 that bump unsettled Jim Clark and he took a wee excursion into the outfield spinning a couple of times, hopped out of the car, had a quick look, leapt back in and roared off after McLaren! he was black flagged for a loose nose cone and McLaren took another win at Teretonga. Incidently I think the pit stop to remove the nose cone was around 7-9 seconds but in the days before pitlane speed limits.