WORKS IN SV_PURE 1!
The beat matches. The tempo matches. It's too good to not be made. Introducing the "She Came From Outer Space" MvM Tracks.
The idea came from a Discord DM between me and my friend, the86thplayer.
Script comes from DavidLink's "Sv_pure Sound Utility Script." Cheers!
Please note that, in order for an error-free experience, the rest of the files in TF2's "music" folder have been included in the mod. Removing any of the files in the mod will render that sound unplayable, due to the nature of the script.
Removing the mod folder itself is fine, however. Don't worry about your sound breaking if you uninstall the mod.