Check with your local Jobs & Family. They should have a list of childcare providers (center based & in home) that are in your area. Usually they send this list out to those who are on government assistance (because the list will be of those centers or home based providers that accept government assistance), but it is available to anyone who asks.
Also, check in the neighborhoods around the schools. A lot of times people with home based "centers" will post signs outside their home to advertise that they provide childcare. Post an ad in the local weekly paper. Post an ad on Craigslist or even check there for ads. Ask your co-workers if they know of someone in your area.