Where to look for flowergirl dresses?

I am going to have 2 flowergirls who will be 7 and 9 years old. I have had a look for dresses but just can't find anything even close to what I want. I want proper beautiful princess dresses in a dusky pink colour. As they are my daughter and sister this is a big deal to me as want them to feel really special. I ordered some from BHS and they were the perfect colour but weren't the right shape as the body bit was really short and the skirt only reached calf length which looked storage with the massive princess skirt, needs to be floor length! Have tried the usual debenhams, BHS, monsoon but to found any with the wow factor. It doesn't help that I don't want to spend a fortune on them :-/