Definitely check out Matt Easton.  Also contact Scott Rodell of the Great River Taoist Center (grtc.org) and start a conversation with him.  He can also help if you are interested in a vintage original (most likely a 19th c.) dao.  Also, learn about the variety of daos out there.  The so-called "Chinese broadsword" which often goes but the general term "dao" is only one style, mostly civilian, from the 18th to 20th centuries, called the nieu-wei dao, or "oxtail saber".  Others, more military and often earlier, are the liuyedao ("willow leaf saber") and the yanmaodao ("goose quill saber").
Scott is a terrific instructor and now has a distance learning program for how to handle a sword in various historical Chinese traditions.
Again, like your quest for a Greek sword, I ask what are your goals for owning the sword.  It will help guide your search.