How to build/where to buy small sticker betw. Display/notific.-LED?

last week, I received a broken Nexus 4, where I changed the display assembly.

Unfortunately, the lower side of the original glass was totally cracked, so I had problems to peel of the small label/sticker, which is between the glass and notification LED.

I peeled it off and put it on the new glass, but now, the led is very very dark and does not show the colors proberly.

I did not find any replacement to buy... Does anyone have an idea how to to buy it / to build it?

My first idea would be to print out a black area with a small hole in the center on simple paper and to fix it on the glass... But does it match the original style?

Picture LED

Thanks in advance!