The foil is called electroluminescence foil( hope i wrote it correectly ). you can get it via Farnell, or ?? -
I have LCDs withou backlight - those have a refelctive foil that i have to remove before being able to put el foil - but i 'm actually not very decidet to remove it because of possible dammage so actually i didn't bought el foil yet . But it 'll come

the blue and white - blue with inverted chars and white ( black chars on white background ) that will be coooool
So seek a bit on the elektronik suppliers websites or catalogues and you'll surely find el-foil!
Regards
Felix