Hi Christine,
I am not sure if you found Benjamen but I was online at pet harbor and saw a yorkie that looked a little like Benjamen at the Riverside animal shelter. Here is the link
PetHarbor.com: Animal Shelter adopt a pet; dogs, cats, puppies, kittens! Humane Society, SPCA. Lost & Found. I search all shelters and you put in your zip. Go to lost dogs and search yorkies and he is on page 3. Good luck. I also PM you