On my machine, with MS Access installed, Microsoft ODBC drivers for both Access and dBase are installed without any additional download required. You are probably finding difficulty downloading more because everyone just uses the default ones.
See the link below if you can't see the drivers (it could be an x64 / x32bit issue):
Windows 7 RC ODBC Access driver
Personally I've only used the Access one and that was a while ago as a proof of concept - good luck!
RR