1920s wedding dress

Okay y'all, I've got a fashion question:
I'm going to be a bridesmaid in a wedding and I need to find a "short white dress like these."
I never wear shit like this so I have no idea where to go. Hahaha. Any recommendations?

Coquina White Lace Bodycon Dress Ladies looking stunning in the Coquina White Lace Bodycon Dress is a widespread phenomenon! A sheer mesh decolletage meets scalloped lace and a plunging neckline, while a low V dips at back atop a hidden zipper. Medium-weight knit fabric completes the sexy silhouette with a bodycon skirt.lulus.com 1920s wedding dress