Quoted from HEEELEY:Curly at Little Shop of Games sells the Arwin Plastic. It comes with an extra piece of PETG plastic as a protector on top. http://littleshopofgames.com/product/lord-of-the-rings-arwen-plastic-with-protector-plastic/
I just ordered one of these pieces from Timebandit and look forward to installing it as well.
Is the "Improved Arwen Plastic Protector" needed if you already have the extra PETG plastic installed?