non existant sound file (name)?

[jlrm365]

How can I find the sound file "MON_CorruptedTentacle_CreatureLoop"?

This used to be my go-to video for sound extraction
How to extract models/sounds from Blizzard Games after new file system

This was the equivalent reddit post
How to mute annoying sounds (tutorial)

I haven't looked for sounds in a while and, as you can see, those links aren't recent.

As part of the Amalgam of Destruction pet, this sound has become annoying
MON_CorruptedTentacle_CreatureLoop

I have started up
Casc Viewer
and gone through all of the sounds I can, using the most recent listfile that seems possible
bloerwald / LegionFiles

Clicking the sound file on the wowhead page, as linked above, only gives me "/script PlaySoundKitID(452)"
That seems fine, but I am unable to translate that information into a sound file name (so that I can find it).

I'm sure that, as mentioned in the reddit post above, clicking a wowhead sound link used to give something like "/script PlaySoundFile("sound\\creature\\hydra\\mhydrastand2a.ogg")". That would be useful, as you can see the directory in which to find the sound. PlaySoundKitID seems meaningless in comparison.

Again - How can I find the sound file "MON_CorruptedTentacle_CreatureLoop"?
It seems to not exist, but that would be impossible. I can hear it in-game, and wish that I could not, so it must be there.

Thanks!