So I've been trying to find some more modest dresses so Shae, Stacy and Brittany don't have to feel completely uncomfortable. Here are a few I like, all would be in the turquoise color of the first one:
(I actually really like this one)
ALYCE DESIGNS : JDL BOUTIQUE DRESS DETAILS
And the 2nd and 3rd ones we can easily add sleeves and a modesty panel for the neckline.