Corrupted Key Guardian Locations

I've been looking for the Corrupted Lost Sanctuary Key Guardian, and the Corrupted Underworld Crypt Key Guardian, and have not found anything, but the Key Guardians that supposedly spawn in the Canyon of The Lost (including the Corrupted Underworld Crypt) are nowhere to be found. I've tried looking for the locations, but all of the forums are from about 7 years ago and may have changed by now. If someone has the coordinates of a spot where you usually can find them, could you let me know?

Thanks!

 

https://forums.wynncraft.com/threads/rare-mob-spawn-node-guide.278344/
should be decently accurate