VIN's weren't recorded until 1988 in Australia.
The only way he's going to be able to find something is through an old service manual that Toyota has or something to that effect.
Unfortunately, there isnt a lot to go on, BUT, I have someone I can ask regarding KE1x info. He might be able to scan me a few brochures or point me in the direction that you need to go.
I'll see what I can do. :)