Never heard of them. I will do some checking around. Here the shelter only gives animals 24 hours. Most of the animals they get are abandoned semi ferals or former fighting dogs. I keep going and looking at the dogs and cats. None of them has picked me yet in a way that says this is the one.
These older dogs have the hardest time finding a new home but an older adult should be a good fit because it will be past the puppy energy.
I would suggest contacting a rescue group rather than the shelter because good rescue groups do a really good job matching humans and pets. They will ask a lot of questions, may even want to do a home inspection because they want to make sure the dog will have a good home.
Rescues dont get any funding from anywhere, they pay for everything themselves and have a lot of time and love in these dogs so they really care.
Consider getting a small to medium mixed breed dog - in the vet business we always say that they tend to inherit all the best traits of all the breeds in them and we saw those mixed breeds for problems a lot less than pure breeds. On the other hand getting a pure breed allows you to know what personality your dog will have.
Edit: one more thing I thought of. Good rescue groups make sure their dogs are well socialized and are potty trained before they adopt them out and that makes all the worl of difference in how it works out for the new owners.