Ah, now I see what you're trying to do. I was wondering what on earth you meant when you said you "need" them by early March. Now I understand.
If you're looking for ducks for show next year, my very strong recommendation is that you buy 2015 ducks now or in the fall. You are likely going to have a very, very hard time finding those kind of hatching eggs at any time of the year, and I don't mean just shipped ones. I wouldn't be able to sell you a hatching egg if you came to my house, and that's because that egg might contain the best duckling I would get all season. Same thing with selling ducklings. You can't tell for sure how a duckling will turn out until it's a couple of months old. Since my hubby and I breed for show, we don't sell any eggs, and we don't sell ducklings. You're going to find that's overwhelmingly the case with people who breed show ducks.
The other advantage to getting 2015 ducks this fall is that the ducks will have already been graded and sexed, and that will give time for them to get to know you, and also for their cage training. You'll open yourself to a nationwide search for what you want since those would most likely be shipped ducks.
How does that sound?