Have been browsing this shop for retro options for spring/summer. They have some great 50s silhouettes: circle skirts, wiggle dresses, peplum tops, high-waisted shorts… Move over Joan Holloway.
Here are the pieces on my shortlist:
Probably not this, but I like it.
Always looking for light (linen or thin cotton) white/ivory dresses for summer. 
Or this in black…
Love these full circle skirts that reach just past the knee. I find that vintage silhouette so youthful and flattering, ideal for a sundress (as if you would have to be eating a Popsicle if you were wearing one). Especially keen on this last floral one. I recognize that it is not exactly versatile but…I don’t care. The magenta wiggle skirt I love, too. Definitely want this or something like this.