I have a number of Vollers corsets, all of which have lasted in good shape for many years. They're never going to be as good as made to measure, but they're decent quality for the price and they have a wide range of styles.
If you've never worn a 'proper' corset before, practice wearing it as much as you can before your honeymoon; it will become more comfortable over time and the fit will become more moulded to your shape.