I went in to buy a strapless bra and the saleswoman immediately pointed out that they did not have anything larger than a 38 in a strapless. Her tone seemed rude and condescending. It did not make me want to come back later to look for other lingerie.
Trousseau offers a service for you to try on various bustiers with your dress. Lovely. We hauled my 20lb dress to their cute boutique on Southport and they found me the perfect bustier for my wedding day. The service was outstanding. The price was reasonable. I would highly recommend.