The company is called   Trident Plastic's 44 Munibung rd Cardiff NSW  ph 02 4954545.
the plastic he showed me is nowhere as brittle as perspex he called it PRTG balls hitting this wont damage it, it bends with out snapping. An 8 x 4 sheet of it costs $127 thats a lot of pinball plastics!

Here is a pic of what they are talking about. I scored this yesterday from a local signwriter. It measures 1500mm x 450mm x 1.6mm .... Signwriter reckons he throws heaps of it out in similar sizes as customers pay for full sheets as part of standard jobs and is now going to keep it for me.....