Here's how to make your own -
Step one - Get aTube catcher program
Step two - Open aTube catcher program
Step three - go on audio record and check the box labeled "catch sound from speakers"
Step 4 - Press record and quickly start the sound to record.
Step 5 - Go for about 15 seconds, or however long you want the loop.
Step 6 - stop recording, and get the Audacity program.
Step 7 - Open the sound file in your audacity program
Step 8 - edit it as you please.
Step 9 - Export it as a .ogg file
Step 10 - Put the .ogg file in your Blockland/Addons/Music folder
Step 11 - Enable it and play!