I've been many times and it is fascinating. My favorites are Mood, spandex House and a trim shop that is close that I can't remember the of. There is also a museum that was pretty interesting. FIT (where PR films is across the street from Mood. It is a lot of fun and there are so many small shops with lace etc., everything for the Broadway shows costumes. Enjoy yourself, it is fascinating!
This link might give you some ideas too.
http://www.shopthegarmentdistrict.co...stores_30.html