Some of my favorite songs have been forever removed from newgrounds but I know their submission codes.
Reserved - My favorite song to which i will never get to see again. It was removed from this site but it was on my now dead computer. You will forever RIP. If only i could remember the name of it. I can't even remember the name of my once favorite song. How sad. (Although it wouldn't mater anyway unless i got into contact with someone else who had downloaded it) I was hoping to find the song here on NG again after my computer crashed. But alas, no dice.
Captain Galactic - Mischief Walks Among Us - (Not a song from newgrounds, but from a friend and i can't seem to find it online anymore. The copy I have is low quality however.)
357431__Baf__Industrial_Acid__Head - @Bafana
Might reupload the ones i still have to instaud.io