Move existing packages to new hardware on a SCCM 2012 DP, without having to copy across the WAN.

I have several servers that are SCCM 2012 SP1 DP's, and those servers are being decommissioned, and new hardware is being built to replace them. How do i migrate all my existing packages from the old hardware to the new hardware, without having to copy everything across our WAN again? It would be like  using the PreLoadPkgOnsite.exe tool in SCCM 2007. I am looking at the Prestage Content feature in SCCm 2012, but it looks like the pkgx files are created on the site server, and you still have to copy across the WAN to the remote DP. Is there a process in SCCM 2012 that avoids having to copy over the WAN again, like there was in SCCM 2007?

Thanks, Rich