Jennifer,
Red sex-links are a cross breed and will never compete in an APA or ABA sanctioned show due to that fact. You need to select a pure breed of poultry that best suits your needs and then purchase them from a proven breeder/exhibitor. I see you are in Summertown, ?? Since there are several Summertowns in the U.S. I cannot generalize and direct you to the best sources of poultry in your area but I can make some recommendations:
1. Get you an APA standard or ABA standard depending on if you wish to raise Large or Bantam Chickens. You can find these on the American Poultry Association website or the American Bantam Association website. Both are a very good buy considering the quality of the book.
2. Subscribe to the Poultry Press, a monthy poultry show news paper that covers all the poultry shows in the U.S. and Canada and has advertisements from many experienced breeders/exhibitors. This will give you some ideas as to who to contact for your specific needs.
3. Attend some poultry shows in your area, you can find out what shows are in your area by subscribing to the Poultry Press.
If you are sure of the breed/variety you want, PM me, I know lots of people in the fancy and may know someone who could provide you with good stock to get your show project started.
Blessings,
Bo