A simple Google search can find you most anything you want. Here's a link to a breed that originated in your area and that many breeders are bringing back to heritage standards:
http://www.americanbuckeyeclub.org/
I don't know what you mean by genetically modified....most breeds have been genetically manipulated to produce certain traits but that has not been done in a science lab. It has been the result of selective breeding of certain strains of the breeds. Even the Cornish Cross, those most frequently referred to as Frankenchickens, are merely the result of intensive breeding programs that have taken traits for fast growth and muscling and promoted them as they select breeding strains.
There are many, many breeds out there who aren't far from their original traits and dedicated breeders out there who are preserving those traits....by selective breeding for them. No genetic modification in sight.