For what it's worth, there is a genealogy "helplist" posted here which lists a Dallas County researcher (down towards the bottom). The page says to read the instructions first before requesting help, and I have not used the services. But, worth a try? Says he covers the following:

Selma, Dallas County, Alabama, USA

Dallas County cemetery records

Newspaper-Selma Times Journal to 1990

Dallas County Census 1830 - 1870