Here is a suggestion... Go LOCAL... There are MANY BYC folks that hatch year around. Not that many ship, but you will be surprised to find how many people have chicks in your area.
Check on BYC's swap threads. You will find there are places near you where folks meet monthly or every other month to sell their extra birds, including chicks.
Word of mouth... ask around, pm folks in your area. Ask them if they know of anyone who has chicks or the breeds you are interested in. If you find someone who has the breeds you want and they are set up to sell chicks, then they probably won't mind doing a custom hatch for you. These will be "Straight run" chicks, since most breeds can not be sexed at birth.
Lastly, watch craigslist for folks selling chicks.
WARNING: Make sure you inspect the chicks. Don't ever purchase a chick that is not active. They should constantly be on the move like hyperactive children. If you go to someone's house or a feed store....MAKE sure that the surrounding chicks look healthy and the living environment looks clean. If the chicks in one cage are active, BUT the chicks in the next pen are looking sick, then healthy ones have been exposed and may come down with sickness in a couple of days....