So you are looking for official links to Windows 7 drivers, on the exactly platform that is being officially blocked, due to a INTEL-MS agreement ? Tito linked exactly the non offically moding stuff to overun the Overlords restricion in place.
@puffyduff You'll find the motherboard manufacturers often have newer drivers (provided from Intel) than Intel. Intel don't do desktop boards any more but do publish updated drivers for their Nuc range... If the drivers are WHQL signed then who care if you downloaded them from Mega?
If you need OEM drivers for Windows 7 you might have to settle with a 170 or a 270 chipset board. As you know, there is no Windows 7 support for the 370 board from Gigabyte