Download Enigma from [here](http://modmuss50.me:8080/job/Chorus/job/Enigma-Chorus/) ([source](https://github.com/ChorusMC/Enigma)). Use the "-all" JAR.
Please remember that copying and pasting mappings from alternate projects under more restrictive licenses (such as MCP) is **completely forbidden**. It is also good to consult name changes with other people via pull requests.