Tricky lighting question

[gjorenby]

I am working on a build that requires a short strip of lighting.  Ideally my though would be to use side glow fiber optic but because of the scale, I need to use .25 mm diameter.  The smallest side glow I can find is .5 mm and that's too large.  I was told by a fiber optic vendor to run unjacketed .25 mm fiber through some 000 steel wool and that might work, but again, because of the size, the light being emmitted is not sufficient for the effect I am looking for.  Looking for suggestions...it does not have to be round, but can't be much larger that .25 mm.

What I am trying to achieve is a light strip around the opening of a driver's helmet.