Baby Shower Dresses?

J
I'm having my baby shower on Dec.10th and everything is vintage pinks, whites, and champagne colored. I'm 28 1/2 weeks and not in maternity clothes yet. My bumpy is big (to me) but am the same size everywhere else. I went from a size 2 to a size 4 in bottoms with a little help from my belly belt. 
I'm having trouble finding the perfect baby shower dress since maternity wear is too big but I still need stretchy fabric for the baby belly. Any suggestions on stores or sites that you guys loved? 
I found two that I loved but seemed a little over the time for a brunch shower. It will definitely be fancy, but a lace gown seems like too much!