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

Chiss 064dd97d00 HitBox support for disguises ... Squid hitbox added Changed squid swimming!		2013-09-24 08:56:09 +10:00
Maps	Bob wants to play!	2013-08-29 15:55:49 +10:00
Plugins	HitBox support for disguises	2013-09-24 08:56:09 +10:00
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	Updated to 1.6.4	2013-09-20 01:50:56 -07:00