http://www.technicpack.net/tekkit/ Main Page. Server Page. 3.1.2 is listed under previous versions.
As someone who came back after the semester ended and updated my server to 3.1.3 because it's plastered everywhere as the most up to date build, with no inclination of being a dev build on the main site: Kindly take your unjustified attitude with you and get out yourself.