Some ferret shelters do have young ones in at times from unwanted litters and what not. Also, you can specify you want one on the healthier side, and a lot of times they have those too. They also have older ferrets who have been through tons of crap and just need a place to "retire" Normally something for everyone!
I hope you get lucky and find the one for you at a shelter! But then again I am sure there are local breeders as well.