You could try Yumi, they are a bit of a mix I think but some of them might be up your street and they are available for quite a bit less I think. They do some nice ones with long sheer sleeves with various prints or scenes on (and other types too).
A friend of mine was once wearing a Joe Browns dress that was very like a desigual dress I have. (I've had that particular dress for about 4 years and wear it once or twice a fortnight, in the summer, do it had been good value for money, even if it wasn't cheap.)
You could also try vintage-y styles if you fancy something different? Take a look at Little Wings Factory or Lindy Bop online for examples, they are generally flattering and a lot of them very wedding-suitable.