Electricians: Who stocks Lightolier recessed trims for 3 3/4" incandescent cans?

I have a job that's 1 1/2 away from home, and it had a lot of these cans throughout the unit, but in one location the builder missed a can, and left it covered up by drywall. So now I need to find a matching trim. If you're unfamiliar, Lightolier cans are part of the trim, and connect to the socket, so no other brand or type of trim would work in it's place. I really need to get a hold of one tomorrow morning and don't know who carries them in stock, and the internet has not been very helpful, as all the suppliers I know of fail to list their products... thanks.