I tried to search, saddly even though I found the driver.
The setup.exe weren't included on unoficiall atheros website.
Found some mentions of it on Dell forums, but no luck with the driver.
They also seem to had problems with it, at it was just re-brand of something other......wow, really Dell.
Anyway did you even try installing the drivers that are in supported site on your model on the link I gave you.
Even if it isn't same driver, it won't do damage to your PC, it will just say it's unsupported and won't install instead.
Cause sometimes, manufacturers write one chipset name on the name of file, but instead it supports many other chipsets too.