Suggestions On Where To Find. . .

Ok. . . Let me tell you a little back ground then what i need.

I`m planning my fiance`s 25th birthday party for him and some friends. I`m hiring two girls for him and a bunch of his guy friends. Mind you this is all a surprise to him.

I want to make it seem like we`re going to have a quiet nite at a really nice hotel and when he gets there, theres a big cake (fake) waiting with no one around.

First his friends will come out of the other room to surprise him. Second the two girls will pop out of the cake. Then of course I`ll leave and let the festivities begin.

Heres where I need help. Where do I find a cake for the girls to pop out of? Any suggestions? I don`t even know what its called to start searching!