Not sure if you've found this site in your research, but Senior Care, Assisted Living, Nursing Homes | A Place for Mom
is a free service that provides you with one on one assistance through an eldercare advisor that handles the area you are searching. You can also search their site for a list of options, but talking to a live person might really help you narrow the options for your parents.
They also have articles about the cost of assisted living and all sort of other topics.
Good luck in your search!