No one other than company geologists, probably, has a 'bankable' map. I have several maps that were made available to the public, and the Haynesville Shale is shown to be bigger each time a map is published. However, the well activities that I have seen suggests that the Exco Resources Map is probably as good as we can have for the moment. See:
http://msnmoney.brand.edgar-online.com/EFX_dll/EDGARpro.dll?FetchFilingHTML1?ID=5851865&SessionID=5RgcWZDBP11rCl9

Navigate to 'Haynesville Shale'

If you are in southern Rusk county, you are probably in what this map calls the Haynesville Shale. There are several develpment wells that seem to follow a line from Carthage to Cushing.