JennyGrey. You can check out her Etsy shop and purchase this dress from her for just $15. It also will fit MSD-sized dolls (such as Goodreau Dolls) as well.
The dress is made from silk and has delicate lace trim. Currently, there is only one of these in stock at her shop, but I bet when she sells out, she would gladly make you another.
The quality of Jen's items are really amazing--I have a lot of her items. I highly recommend her professional service, as well!