While "Aturax" appears as a producer on SoundCloud , there is currently no direct public link or widely indexed post for a specific "Squelch Pack" under that exact name in major sample repositories.
SoundMorph offers cinematic and robotic "squelch" textures in packs like Robotic Lifeforms . Download Aturax's Squelch Pack zip
Soundsnap is a reliable source for individual squelch sound effects for comic or mechanical sound design. While "Aturax" appears as a producer on SoundCloud
If you are looking for high-quality squelch samples or tutorials to achieve that sound, you might find these alternatives helpful: you might find these alternatives helpful: