I noticed that Klinger is now selling their crystal models on Amazon. I've included a few samples below.
You can see these are some rather intricate models. I unfortunately have never seen one in person, but I get the impression that their product photos aren’t doing them any favors. (I'm one to talk!)
Klinger Educational is also the U.S. distributor for Leybold's line of models. I’m not sure how that arrangement works, but I’ve noticed that Klinger has a wider range without much overlap with Leybold. Happily, there seem to be plenty of crystal structures for everyone…myself included.