Latitude E6500 missing only Network Controller driver for Windows 7 64-bit

I've tried all the network drivers listed on support.dell.com for the E6500. Also tried the WLAN Half-Mini Card drivers, Intel's driver update utility, and Intel's WiMax/WiFi Link 5150 drivers - to no avail.

Does anyone know exactly which driver I need for the Network Controller on Windows 7 64-bit?