https://digi16sa.sfo3.digitaloceanspaces.com/research/digi16sa-(210).html
The navy costume gives the impression of separates but is definitely a one-piece.
https://digi603sa.netlify.app/research/digi603sa-(477)
Before you start your search (around the six- to eight-month mark), brush up on mother-of-the-bride apparel etiquette.