[quote=AgniSpirit]
What about the bejeweled collar thing? Get a lighter fabric and cut out shapes to stick on a darker fabric?
[/quote]

I'd try to find something harder than that, (maybe a few strips of duct tape?) since they need to reflect a little too. While I don't know about cosplay, I do know how to break down complicated clothes into simpler terms. [s]My old fanfic days of describing Kingdom Hearts clothes is helping[/s]
Go ahead and ignore me if this is not helpful, I'm just trying to offer my poor advice.