Moonflowers, calla lillies, Orchids?

Hey I'm looking for a place to buy my girlfriend some flowers when she flys up to visit. I'm looking for like a bouquet or something that looks like a dozen roses would, not like I'm buying her a plant. Her favorite are Moonflowers, Calla lillies and Orchids, any idea what types of stores I could find these? Would nurseries have them? I live in Buffalo New york if that matters, and I would really prefere not to buy them online, thanks for the help