Golden Retriever willing to visit my elderly Dad in Danville, California?

I'm looking for a calm golden retriever willing to hang out with my elderly dad maybe one afternoon a week. He lives in Diablo, California and misses his. Any ideas? He is on a walker with precarious balance and probably shouldn't take on another dog -- b/c my mom already has enough on her hands. But he could certainly love the cheerful company of a dog. I appreciate any ideas...He is of sound man and a good guy...