Where to find megasys.sys/msicsi.sys for Windows Server 2012 R2.

Hi,
I'm trying to upgrade from windows server 2008 R2 to Windows Server 2012 R2 (64Bit). When the upgrade starts I get the prompt to provide the storage drivers. I can't find the drivers that I could put on a USB or otherwise, so that Windows can resume the upgrade. Please point me to where to get them or a url that will help. I've installed the latest firmware for anything that I can find (BIOS, Chipset, drivers for OS deployment, etc.). The drivers I mention above are what the current deployment is using.
 
Here's the storage software config I have running on the Dell 710R running WindowServer 2008R2.

"storage controller perc 6i scsi disk drive controller"

Dell perc 6/I integrated Raid controller (megasas.sys)

• Microsoft iScsi initiator (Msicsi.sys)
• iscilog.dll
• File version 6.0.6002.18005.
  I've scoured the installation media for both the WindowsServer 2008R2 and  WindowsServer 2012 R2 looking for drivers. Please send me a link for the drivers or a KB telling me what to do. I basically need the driver install files to provide during The upgrade to Windows Server 2012R2.

Thank You in advance for help.

Steve