The source code from mineplex 2018 leak with commit history dating back to 2014, it requires a lengthy setup to get functional but is a reasonably easy compile if you know what your doing just have to repatch the spigot

Jonathan Williams ff6488b371 safe file separators		2013-11-05 16:10:14 -08:00
Maps	Bob wants to play!	2013-08-29 15:55:49 +10:00
Plugins	safe file separators	2013-11-05 16:10:14 -08:00
TestApps/LOCTester	Initial Commit	2013-08-27 08:14:08 -07:00
TexturePack	Initial Commit	2013-08-27 08:14:08 -07:00
Webserver/ServerHandler	Initial Commit	2013-08-27 08:14:08 -07:00
Website	Added timeout check for status retrieval	2013-10-26 16:36:48 -05:00