Trying to make an Amish plain dress (Please See comment Sewing Machines Parts and Sales in Los Angeles

I’m not really good at drafting my own patterns and there doesn’t seem to be anything similar at any of my local sewing stores. Plus I’m looking at the Amish/Mennonite/Quaker sites and I just can’t afford their prices or wait for delivery.

Can anyone suggest what would be the closets commercially available dress pattern that’s similar to this photo: http://img1.imagilive.com/0316/mennodressOO3.jpg