Mike, if you're up for a short trip, Chapman's Orchids in Apopka had a good selection of Cyms when we visited in February.
I don't think he sells anything online. If you go to his greenhouse, his prices are very reasonable, too.
Best to call first and make sure he's open, though. http://www.chapmansorchids.com...
In fact if you call, he might be able to tell you if he's got it or recommend another orchid grower who might. There are dozens - possibly hundreds - of orchid growers in your area.