Try the closest contact to you. They should be able to help locate a reputable breeder for you:
Central Jersey Collie Club
Chuck Yaeger, P.O. Box 6281, Freehold, NJ 07728
Collie Club of Northern New Jersey
Gerrie Oliver, 60 Columbus Ave., Closter, NJ 07624
Hunterdon Hills Collie Club
Kris Provenzano, 7 Hamilton Ave., Hopewell, NJ 08525
South Jersey Collie Club
Linda Moore, 2670 E. Grant Ave., Williamstown, NJ 08094
or:
Collie Club of America regards,
toodles