calumet camera should have it,

check graphic arts supply, actually printer's supply, they would put larger
sheets of the filter over the lights to limit reflections off the work to be
copied, (in conjunction with the filter on the camera.)


Does anyone know a supplier (in UK) of polarising film in sheet form?
I'm after a sheet about A4 in size from which to make a built-in
Polaroid sunstrip for my crash helmet. The idea is so that I do not
have to wear sunglasses and can, thus, look 'under' the strip if
necessary, i.e. when riding through tunnels etc.

TIA Richard