After checking the SNES section of the sound resource, Mother 2/Earthbound was nowhere to be found.
I plan to add these sounds myself, but anyone else is obviously free to contribute if they want.
This isn't really my department - but if you want to start ripping the sounds, just do it lol. As long as you're not posting the soundtrack I don't see how it'd be any problem.
Also I was gonna close the topic? but then realized nothing was wrong?
But now that you're The King Of This Ripping Project, you may wanna consider changing the tone of the top post to something more like "Earthbound Sound Ripping Project" "Here's what I'm doing and here's my progress!"