If you are in a bit of a bind, use a Jazz bass nut. It will slightly smaller than the original but will do in a pinch. I had this happen to both my Bronco and Vista Musicmaster.
My musicmaster is my main, so I had that replaced as soon as possible, while the Bronco is the one I kick around and still have the J bass nut on. My fingers can't tell the difference.
Tricked Out Squier Club #45, M2B2 Club #12, Squier MusicMaster Vista Club Member #5
Last edited by redzebra6 : 09-17-2013 at 11:28 PM.