Where to buy Ghost Orchids?

[Kai]

So I'm the kind of person who jumps in the lake to find out if I can swim. For my Birthday, I've convinced my husband that I NEED ghost orchids. I am going to put together a 10-15 gal. terrarium/aquarium, and have it all ready before I even order the plants. My question is, where is a good place to buy them? The only place I've found is Oak Hill Gardens, but I was wondering if there was any place else, so I could compare plant size. I understand that older plants are better to start with.