Yeah! The little rock Laelias are just really really awesome. I love em.
Andy's Orchids carries a number of them – I got an L. mixta and L. fournieri from them a few months ago. They are doing fantastic! Both putting out lots of new growth, and my fournieri has spiked and budded within the last week.
Also, Miranda Orchids has some...they specialize in Brazilian orchids.
Those are the couple places that come to my mind, but there are probably others.
These little guys are just really wonderful, and if you can give them enough light, seem relatively easygoing.