I'm also going to recommend the butterick pattern that digit posted. You might have to decrease the size of the sleeves, but it should work.
As for fabric, it might be some sort of a brocade/sari fabric, although I've seen people use a calico cotton fabric for it too. You could also get some fabric(maybe a satin?) that matches the main color of the dress and paint the designs on(embroider if you're really ambitious). You might also want to check some smaller fabric stores. I don't think I've ever seen fabric that looks like that in JoAnn's, so it might be wise to hit up some other stores.