According to Graham Vercoe's book the Lawrences owned both bobtail Coopers at one stage, and built up a good and a not-so-good car out of the parts.
Here is Merv Neil at a Ramarama hillclimb late 1958 (I think). Jamie's car had Cooper 500 wheels, unlike these "banana" ones, but I think it's the same chassis.
I have some colour slides from 1960-61 Ardmore GP meeting sports car Le Mans starts. I will look through them and see which Coopers can be identified. Drivers like Colin Ngan, Doug Lawrence, Merv Neil again.
Stu