Here is a pattern for an Early American dress. I made one similiar to this for Christmas for my daughter 2 years ago. I think it is a size 6 or 7. Probably too small for your daughter. How much time do you have to make it? If you can follow patterns, and get help from the board, you can do it!
http://www.mccallpattern.com/item/M5...ostumes&page=3
Also, if you watch Joann Fabrics, they will have their patterns on sale for $2-3 at certain times.