Some local favorites, SMITING SHILLELAGH, with Mike O'Bohan rocking the Mustang (its a reissue I believe, I've played it once...)
Already posted but SONIC YOUTH:
The last one isn't a Mustang, but it makes me wonder where FMI gets it's original ideas...
So does this Kurt Cobain Mustang:
Mudhoney chronicled on the supreme Superfuzz Bigmuff + Mustang:
Also, not sure about the Fender Custom/ Maverick, but it has Mustang hardware