I am refurbishing my 1948 speedometer. There is a high beam indicator light socket. When I tore into it, I found what looked like a black disk with a hole in the center in that socket. It crumbled when I touched it. I put a piece of it on a light bulb and saw that it is an opaque dark red. I would like to replace it. I can't find one, does anyone know where I can get a replacement? I remember stage lights used gells, some kind of colored opaque sheets to create colored spotlights. Something like that might work. It has to be able to survive the heat of the indicator bulb. I did find a High beam dash lens set for '55-'56 car. Does anyone know if that is the same size as the 1948 truck speedometer?
