Gothic Haven gives you what you need for goth gear, right down to a great chart for helping you determine corset sizing. With sizing that allows for up to 32 (defined as a 49″ waist), there are some generous options here, although, again, steel yourself for the sticker punch – many items are in excess of 250 sterling/$500 US.
The selection is limited, but it does offer gothic bridal wear and lingerie. If I had to pick a favorite, I’d probably lean towards the
Elizabethan Stay corset.