There is clear plastic used in packaging some holiday items here, I don't know what you have there in the yewkay, but it is fairly tough and can be gently heated and formed.
Sorry I can't be more helpful, but maybe you can puzzle it out, I am always looking for everyday items that can be used for modeling.
Go to your local mega-mart type store and just wander around, you might spot something you had never thought of before.
Good luck, and happy modeling!