https://digi577sa.z11.web.core.windows.net/research/digi577sa-(500).html
Saks is definitely top-of-the-line department stores for getting a mother-of-the-bride gown.
https://digi27sa.sfo3.digitaloceanspaces.com/research/digi27sa-(325).html
For blogger Jenny Bernheim's fancy rehearsal dinner, her mother wore a Carmen Marc Valvo dress, complete with a beaded phantasm cut-out.
https://digi569sa.z48.web.core.windows.net/research/digi569sa-(125).html
If chic and complex is what you're going for, think about this sequined ensemble from Alex Evenings.