Under and over garments

Hi everyone, I am thinking about where to look for a corset for the day of. Any ideas on some good places?

I am also in debate about getting a lace bolero to wear over my dress. I do not really want to but we are having a chuppa and a rabbi marrying us so my FMIL is starting to push the idea. I thought I could at least give it a try. Where would i begin to look?