This plastic should be easy to find - there would of been thousands of CE parted out.
Try RGP or www.mrpinball.com with wanted to buy ad - both free! Nothing to lose!
Good idea Tony, I did try RGP but no response, I suspect it was one of the plastics that was most commonly broken as it is huge and exposed somewhat. The size make repro-ing it difficult as its way bigger than A4, and that's as big as my stuff goes. Might get my mate at Kwik Kopy in on it as he'll be able to handle the bigger print.