could use torana but they are getting scarce maybe toyota hiace van
so maybe build what they call a mcsorly chassis which is a longer and wider
7 type frame and fit the cobra body to the frame ?
I dont know how long you have been away from nz for but this might make you smile

i was having some drinks

with my mates when one said he had just brought a body for a rally car he is building mk2 escort 2door $5000

nz dollars for a standard 2 door escort without motor or gearbox that they will have to cage and seamweld
they looked at another one i know of that was for sale but the guy wanted $10000

for a rolling body i remember when you could buy one for $100