Goodness, gorgeous clothes but these Needle Thread people know how to charge, don’t they?
Have you seen Lexy London OP? I saw a feature on them a few days ago and had a quick look at their website. Some really lovely things.
My other ideas might be Pink City Prints and Aspiga.
Having said all this, I think it’s lovely you are making such an effort for the wedding and I imagine you will look lovely (and appropriate) in whatever you end up choosing.