Hello! I am in Ottawa and there are a few good breeders in this general area, but you could also check out the Cavalier Club of Canada and their breeder directory. All listed breeders are in good standing with the club but make sure you question each individual for their health testing, etc. http://www.cavaliercanada.com/breeder_directory.php. One thing that I found wasn't discussed during my search was SM and patellas. Most breeders focus on heart tests - which isn't a bad thing but question on the other health issues as well. Good luck
Also, don't be dismayed by those who don't have websites! Call people - a lot of breeders focus their lives on their dogs and aren't too computer savvy.
Lady (1.5 year old tricolour) & Gracie (4 year old blenheim)
"Happiness is a warm puppy" - Charles M. Schulz