I don't have any answers for you, but I hope someone can steer you in the right direction.
So many of our elders are forced to give up their companions when they need to go into "homes". It's a very great loss ... sometimes, the pet was the only reliable companionship the person had
. Having a dog or cat around is very soothing ... I know that Bella-boo can drop my BP by 15 points in about 10 minutes.
Your wish to share your pup with others who can't have one is a very honorable gesture. I wish you luck.