Installation of Unreal 4 blocked behind proxy servers.

We have historically used UDK v3 in our school for gaming classes without problems. Because V4 is not an .exe file download and requires the workstation to connect to the Unreal server for download and installation and running the process is blocked by proxy servers that we have no access to. Any suggestions?

I would suggest getting the full source build from GitHub, and manually building it in Visual Studio for each computer as this requires no internet access except for the one-time initial download, however this might be a hassle since there will probably be a lot of computers that it needs to be installed on.