I wouldn't use efowl either... The prices are insanely high. $130 for a pair of mandies. That I'd 2x the cost of a pair and then some! Unless you have money to blow, I wouldn't get them there.
You may have to wait until fall cause thats when most breeders sell them. Good luck though!
I wouldn't buy hatching eggs unless you can get them at the persons farm. Oranmental duck eggs do not handle shipping well at all. If I were you I would try to find an adult pair.