I use Grafix clear 48# vellum available at art supply stores like Rex art online. The blue does come from the dial face. I have cut many pieces from these sheets and feel the color result is most authentic. I also use black E6000 adhesive- available at craft stores , (even wally world) adhesive to seal the edges and metal face rubber pieces. Just some ideas if you are going this deep. Bulbs are available many places but make sure they are the proper voltage and current, it can mess up whole circuits if not. 8V 0.2 amp from the parts list in the SM