Wild Ginger has patterns called Click & Sew, I've made them for both me and my sister. I'm about a size 14 and my sister is 18/20, if that helps. They worked rather well, but are limited on the patterns. A website called SewingPatterns.com has a couple of "patterns" similar where you buy the CD it has about 20 to 30 items you can make. You take your measurements and print them out. I just ordered one through them, but I don't know how well they work. I like the more modern up to date fashion, and its only $25/CD. They have about 30 CDs to choice from ranging from Menswear to Women's, there is a plus size CD. The link for the pattern CDs is http://www.sewingpatterns.com/sewingframe.php?mdl=http://www.sewingpatterns.com/leko-main.html
Hope this helps you some.