Uh..
http://www.sonicyouth.com/mustang/eq/oct05gear.html Theres an update on the '05 return of two stolen guitars.
Also, before that, in 2002, this guitar came back into sonic hands after being discovered at an auction:
http://www.sonicyouth.com/mustang/eq/gtr54.html
Aaaaaand finally, in 2006, SY got back a guitar that was stolen before a show in the mid 80s:
http://www.sonicyouth.com/mustang/eq/gtr09.html
Thats it.