Need help to find a QUICK dress solution

Hi hi, thanks so much in advance for any advice!

My bestie is getting married and was slated to do so next fall, however due to some unfortunate and pressing family health reasons, wants to move the timeline up to in the next 30-60 days.

Obviously getting a made to order dress is out of the question. We are perusing sample sales as an avenue for off an off the rack solution, but wondering if there is any other options we should be considering?

For example, I’ve seen other folks find really beautiful full skirts and just pair one with a halter and call it a day - but not sure if there is a platform or place to find such a solution?

This is totally not our area of expertise. We are in the NYC area if that helps.

Thank you!