Jackson DXMG locking nut?

Alright. I'm a Jackson guitar fanatic. On one of my Jackson's, DXMG, one of the screws for my locking nut fell in a little hole in my room which I never knew about. I ordered a locking nut screw from Steward Mac (they said it fits most Licensed Floyd Rose guitars). My nut width is 1.6875 / 43 if that helps any. Where the heck can I order one of these things? Or can I buy them at a guitar store? IF so, let me know which one, be specific please. I live in Manhattan NY if anything. Thanks in advanced.