In my area the well diggers charge per foot. Any idea how deep they have to go?
You can contact someone at a local college in the Geology Department and they may be able to help. Also the USGS (US Geological Survey) usually have a list of many wells that have been drilled in your area.
Other than that, you can look into hiring a Water Witch and I don't say that in jest. In parts of the country, old Indians do that and it works.