ciswomen? Any dress can fit anyone, its just a matter of size.
I personally buy my LG dresses on eBay, the store is called Mariposa Market. There's another store on there called Binkies and Bows that sells more detailed Babygirl/LG/sissy dresses. There's yet ANOTHER store called Leanne's Pretty Dresses that sells more old-fashioned dresses for LGs/Sissies. All these stores are on ebay