
Hi Fiona,
and ~Welcome~ to Champdogs!
You will find that it is against the 'TOS' of this forum for Breeders to advertise their pups, so you will likely not get direct responses from Breeders on this thread.
Members who may know of Litters may very well get in touch with you privately (PM) or on the thread to inform you of litters they may 'know of'

There are many Breeders on this site, so have a browse at their pages, you may also want to get in touch with the Breed Club (they often hold regional puppy lists)
Expect to have quite a 'grilling' from a good breeder, they want to make sure your the right home and this also works in your favour as in a turn a good breeder will be forever on hand to help you when the pup goes home with you.
Might be a good idea to see if you can contact some breeders and ask them if you can visit (many are happy to do this) and this will give you a chance to gauge how your son and dogs interact

(Brace yourself for the fact that *some* breeders wont send pups to familys with very young children) So the more homework you can do and better preparations/groundwork.. the more likely you are to find an excellent pup and breeder (worth their wieght in gold!)
Best of luck in your search! (Its the Kennel Club Discover Dogs at Earls Court in Novemeber thats a good place to go for info too)
Running the 'Idita-choc' Sled race with Lori!..The ORIGINAL Snow Buddies.