Where can I buy microfiber cloth by the yard?

Question

I am looking for optical grade microfiber cloth, the smooth kind that is used to clean eyeglasses and camera lenses, not the one with a rough texture used to clean cars. I need at least 18x12" of microfiber cloth to make a cover out of it. Plus, I'm looking for a black colored fabric. I've only been able to find light colored microfiber cloths up to 16X16" on the Internet. Where can I find this type of cloth for sale by the yard?

Answer 1

A fabric shop should have it.