For all of you new Surface Pro 2 owners out there it is very likely you already got this collection of updates when you setup your new device and checked Windows Update.
However, if you like to keep copies of updates on your local drive then you can grab this collection of updates from the Microsoft Download Center.
Here is the description:
Cumulative firmware and drivers for the Surface Pro 2. This firmware and driver package contains drivers for all of the components in the Surface Pro 2 device, as well as updates to the system firmware that have been released via Windows Update. These drivers and firmware are compatible with Windows 8.1 Pro and Windows 8.1 Enterprise. These drivers and firmware are not compatible with Windows 8.0 or Surface RT.
The package contains an Intel, Marvell, Realtek and Microsoft folder with each containing various drivers for the Surface Pro 2.
My recommendation is to install them via Windows Update but have at them if you want to!