
There are golden Retrievers and there are labradors which can be Yellow, Black of Chocolate. So is it a goldie or Lab you are looking for :)
I would contact the Kennel Club for a list of Breed Clubs and talk to the secretary who may have a puppy list, or can tell you if they know of the breeder in any adverts you may find. There should be advertisers on this list. I would still check that they are the sort of breeder you are looking for. If they are they will cewtainly have Hip Scored and Eye tested their stock, and possibly Elbow screened also.