Here's a link that has additional links in it:
http://www.elegant-wedding-dresses.com/patterns.html
(Just thought I would mention this... My mother made me a prom dress 20 years ago... Even back then, when she factored in the time it took to sew it, plus the cost of the fabric (high quality tafetta and satin) and materials (stays, crinoline, zipper, thread, buttons, etc.), she realized we could have bought a dress at a department store for about the same price. Hopefully, their sewing their own dress more for the sentimental value and not just for cost-savings.)