Call the internet search hounds!

I need help finding a few things on the internet, and for some reason finding proper search terms has always been a weakness of mine.  Consciousness behind the internet, can you help?

I want to put together a Halloween costume like a Mesmer from Guild Wars (a video game).  In particular I liked these armor sets.

These armor sets are generally characterized by: the long overcoat that holds itself out from the body and open; thigh high boots or velveteen stockings; detailing, corset structure, or embroidery about the chest and midriff; full length sleeves, often with embellished cuffs or a flare at the wrist; and a neck band or ruff.

Here's the biggest problem.  I don't see any gowns like this when searching, I find a lot of Victorian gowns or generic renaissance but nothing that is open and holds itself open.  Is this style of gown called something?  Does anyone know a good set of search terms?

Although I don't know how to read patterns, my only other thought is to try and find a gown pattern, cut out the front and put a thicker electrical wire all through the hem to hold it in place.  Suggestions?