Hi! Good Giants can be hard to find because so few maintain a website. You may have luck by checking out some shows in your area.
I know of a breeder in PA who ships eggs and juvenile pairs, but she has not been active in the club recently so I'm not sure if she is currently breeding. The black hen I posted about on page 1 is from her. Her Facebook is Rob's Triple P Poultry, but does not seem to be updated recently.
There are others, but I have no direct personal experience with their stock. If you join the National Jersey Giant Club you receive a member directory which may help. You can also join us in the Facebook group of the same name.
My ultimate goal is to get a pair from Rich Vaughn, who has bred Giants for over 40 years. Unfortunately he is in NE and does not ship.
With it being so late in the year, most breeders are finished hatching until spring. However, you may be able to locate some started birds or slightly older birds that someone is retiring as they thin out their flocks for winter.
I acquired some stock from Maria's Jersey Giants (mentioned above) a few years ago. She does not show, but I was able to grow out my chicks from her and select a nice pair to continue on with.