wedding dress with cape

I know this is probably a long shot but I've found an interview dress and swimsuit for Miss Kentucky (thanks to wedding dress with cape Victoria Humphrey ). NOW I'm looking for a dress to rent/buy.
*Must be for petite size- I'm 5'1" and wear 6in heels.
*Must be couture, no prom.
*Size 2/4ish.
I love ol' blue but I want something different.