Immediately this number came to mind: Vogue 1108. The side bow could easily be done in the reverse fabric to spice it up. However, there's some serious construction involved on this pup so it may or may not happen given my time constraints and this pesky day job thing.
Another contender is Butterick 4790, but only with a decent amount of modification. For starters I'd skinny up those shoulder straps/sleeve caps and I'd slim down that skirt. I heart Betty Draper's wardrobe from Mad Men, but some things should stay in the past and not be packed in my Boston suitcase. The bell-shaped silhouette of this dress is one of them.