Help: Replacement parts Steve Morse signature with locking trem

Hello forum members, my first post and this is about a used Steve Morse signature model I am considering buying, with the tremolo arm and the part of the locking nut that clamps the strings missing. I am from some part of the Globe with limited access to Musicman things, and the local MM dealer is not being of much help in this case. The trem looked like a Gotoh to me even though it is branded Music Man – or Ernie Ball, not sure on that one. This is a recessed trem model. My question ultimatly is: could I be lucky enough that the Gotoh locking trem parts fit right in? the nut width of SM is supposed to be 41 mm something, so will the 41 mm version of the Gotoh locking nut work? Same with the trem arm which looked like it is a screw-in type. Any other helpful ideas will be appreciated as well.