We have a store called, "pet food center" here that has a place to give your dog a bath, in the back of the store. It's really just big sinks with spray hoses, nothing as fancy as what you've described.
I wondered about the health issues, because what I saw here didn't look as clean as what you described. I might use it for Misty, our Golden, but Abby and Daisy are easy enough to wash in the bath tub...still pretty cool though