I think they're in another lab in this spacestation. Caligin mentioned there being another at some point. I could have sworn there was at least one more than what's here.

[He nods] That's...the beauty and scary truth of the technology he uses. He can make them seem real when they're really not. Remember that phonebooth Audrey had set up a couple years ago? That worked on a similar principle. It was only tangible and visible to you--but not anyone else who wasn't meant to see it.