For a good, reputable breeder most of the time there will be a wait time. It's best to do your search now and hope to find a breeder who is planning a litter.. get on the list and then wait for the pups

For example, when we got Joey we started looking in October.. emailed Connie (Ambertru) in the new year.. met her and put a deposit in march.. pups born April.. Joey came home in June. That's considered fast! We were very lucky.
Joey is from Ambertru goldens.. out in the Ottawa area. Connie is a fantastic breeder.. all of her dogs have the recommended clearances, she shows in conformation, and her dogs are BEAUTIFUL! Am I biased? Yes

Honestly though, Connie has also been 100% supportive of Joey and I… ANYTIME I had a question about anything, she is there to answer, help, and guide. Breeder support is so important.
Some other breeders in Ontario are
Amberview goldens
Sterre goldens (Member here)
Conquerer goldens
Bowbell goldens
I know there are others, those are just the first that come to mind. Just make sure the breeders you're looking at have clearances on their dogs, and its always preferred they do some sort of performance with them, wether it be showing, obedience, agility, field, ect.