We know how much trouble it is to find a period costume, not to mention the expense. Taking the time to do that is a huge gift to us and all the rest of the guests. There's really no need to give us anything more that that.
We have registered with Simple Registry here. We prefer not shop at amazon or one of the big box stores and this seemed like a good way to create a list of what we really need and allow the flexibility to get things from good sources.