I am totally going through the same problem! So far I've used the bodice and sleeves from the Simplicity Snow White pattern # 2813 , you just have to make your own diamond appliques, and place them lower on the sleeve than you would for Snow White. Then just measure your arm, and draw out the rest of the long sleeve from there. You'd also want to make the neckline wider, more round, and higher up on the chest. I plan to use the skirt pattern from Simplicity #2589... but I'm intimidated by it, so I don't really have any suggestions about it.
If you're brave enough to tackle the skirt, I'd sure love to hear about it!!