Here you can download all radio communications from the mission.
ADSR just released a free VST Sample Manager to quickly find the right loops and one-shots while your producing in your DAW. They will be synced to your project and also can be triggered by MIDI.
Here´s a walkthrough with Echo Sound Works:
Get sounds from vintage (non-musical) devices at conservethesound.de .
The free section from Krezie Sounds with Wav files & Patches.
Download lot´s of free Sound FX (MP3) at Zapsplat.
…can be downloaded as MP3s here.