Thank you.
The body is made from a plastic (sintra, maybe?) that was easy to shape after soaking in boiling water.
I cut the parts out in the flat plastic, slightly oversized to allow for sanding and formed them over a mug and a bottle neck. After gluing the parts together the edges were cleaned up with bodyfiller. I also used bodyfiller for the detail on the shoulders, I just sanded and filed until I was happy with it.
I was just winging it really.