MM S.U.B rebuild
 

I am in the process of planning a rebuild and refinish of my old SUB that's been out to pasture. I don't plan on spending more than she is worth (sentimental value aside) and would like to replace the current neck with something in maple, both in construction and fret board. I have looked around online and so far all I can find is graphite. Is anyone able to point me in the right direction to obtain a new neck? I am assuming it would be an olp version.