Music pack not available on Marketplace

I had a problem with Jukeboxes not playing, so I googled it and the solution seemed to be to download the Music Pack from the Marketplace, seemed a bit odd (and from the looks of this site, causes many to think there's a bug, which makes sense to think since that's a part of the game that's just completely missing), but simple enough, so I go to the Marketplace, and y'know what I find? Not the music pack. I even searched the "by Minecraft" section and nothing. I was so excited to show my little sister the 3 music disks I found, she's new to Minecraft and absolutely loving it, but no, looks like that's not something I can do anymore.