Wedding Planning Drama!

Well, here it is- the first piece of my planning to go wrong. I am sure there will be others, but the first is still feeling pretty daunting even without the other future dramas to back it up.
So David's bridal called me and said one of the styles I chose for my bridesmaids has been discontinued and there are no more at any of their stores in the style, color and size we need- because of course the last girl who needs to get a dress I happened to put in the dress that is now discontinued.
GRRRRRRRRR.....
Well, plan B-see if Davids will switch all the orders to the same dress
or
plan C-put Cherry in a different dress and even up the numbers
My OCD is going to go crazy trying to figure this one out! (Ok, I'm not ligitamatly OCD, but it will bother me to have 5 girls in one dress and only 2 in a different one!)
Any ideas as to what i should do?