After FIDM I walked the few blocks down 9th until I reached Maple. This is where ALOT of fabric stores are located and smack in the middle of Maple is Michael Levine. A must stop on any fabric hunt.
The prices are just okay but, the selection of fabrics is impressive. From leather hides to oilcloth to Liberty of London to buttons, notions, etc, etc, etc you will probably find it at Michael Levine.