I think the Neo Angelique would be something you can get away with as "close enough" if you don't want to style/dye it. Early April is still plenty of time for ACen, though. Do they have a phone # you can call?

I would go for the dark blue wig, since you're gonna have to cut/style it anyways. I'd even say you can go darker with the wig... it looks more like an indigo.