Calling an agency is a one stop shop that will likely make your planning much easier. And Carmen Fox has some lovely ladies!
Your other option is to check with some of your favourite ladies, and see if they are interested, and if they have some friends who would like to join. It's always best when the ladies know one another and enjoy entertaining together. It creates a beautiful dynamic of fun, teasing, and a bit of healthy competition to shine just a little bit brighter than the others.