Bayouchica, we ordered them from Hoffman Hatchery.
http://www.hoffmanhatchery.com/contact.html
They were the only source we could find with reasonable minimum orders for Muscovies.
We ordered Muscovies online because I have read they survive well in the woods. Muscovies are supposed to be "tree ducks" as opposed to 'water ducks' and therefore will hang around the farm and not just around water. Ours are scheduled to arrive around the third week of June.