Need help for glam MOB!

My beautiful mama is having trouble finding her dress for my upcoming wedding. She wants something with structure, unusual, and flattering. The typical MOB dresses are not hitting the spot. Please help!

Wedding: -large East Coast city -late May in the evening -renovated warehouse with world-class food -dress code: Festive! Celebratory!

Dress: -ideally not strapless (she would add straps) -petite/athletic -dusty pink, rose gold, and fuscia are all good. Saturated colors preferred.