Historical suit rental options.

I will be attending a wedding in August on the Queen Mary. The party has requested that we dress up in period attire if possible. I have been looking at historicalemporium.com, but I really don't want to spend $300-$400 for a suit I will wear once. I'm sure there are costume rental places that can accommodate this, but I'm just not sure where to start. I messaged a couple costume rental places and am waiting to hear back, but I was hoping someone has had experience with this kind of thing. Thanks!