Link to the assets on the roblox marketplace, they are free to use:
Depth:
https://create.roblox.com/marketplace/asset/14898716771/Silly-remake-of-Depth-Doors-Fanmade
Silence:
https://create.roblox.com/marketplace/asset/14900124577/Silly-remake-of-Silence-Doors-Fanmade