Dress Dilemma

Ok, so I am having a bit of a dress dilemma. As you know, I am having dress made by a designer from Etsy. To remind you of what it will look like here is a picture:

Instead of the tuxedo ruffle being brown, it will be aubergine and rather than the superhero cherry lace patch on the cummerbund there will be lace with a fleur de lis and an art deco circle pattern which works well with our art deco/1930s theme (both materials I have posted on).Well about two weeks ago someone posted on the dream dresses thread on Offbeat Bride about the coveted Daphne dress from J. Crew and I fell in love.

I have been searching for this dress on ebay and other sites but have not found it. Just from reading other wedding/J. Crew blogs, it seems like this is the Holy Grail of wedding dresses. Anyway, I was wondering if there is a way to combine the two dresses. My designer has not yet started on it (she has been working feverishly on two other dresses and hasn't started on mine). My wedding isn't until October 10th, so she has plenty of time, so I haven't been pressuring her to get it done right away. However, she informed me earlier this week that she will begin on it next week.Here is a sketch of what this may look like (obviously I am not Project Runway bound):

So what do I do? Do I ask her to incorporate the Daphne into the dress she has already designed? I am willing to pay more and if she needs more time to create a pattern I am fine with that as well. I am so confused now! What am I to do?