Where can i find this Sottero wedding gown under $1000?

What I would do is look at the list of maggie retailers on their website. Then call the shops near you that carry maggie gowns and ask what their price is for that style #. If they're still too high, then take a pic of that gown to local shops and try on similar gowns by lesser known designers that may be cheaper. Any shop can show you similar samples if you just bring them a picture. But don't order off the internet, that's a recipe for disaster.