If the back of the neck is not cracked and you really love the neck it could be fixed with a bow tie inlay. A skilled luthier or cabinet maker can do this. The patch would be visible and the grain of the patch would need to be perpendicular to the grain of the neck for strength.
First link that came up.
The big thing would be to keep glue out of the truss rod channel. The topnut should be removed and the points of the patch extend from the block inlay to the topnut slot. Side to side, I'd have the edge of the bow tie under the outside strings and make the angles on the plug shallower for this repair than shown in the link. Use hickory for the bow tie for it's toughness. The crack in the neck would need to be glued and clamped before the bow tie inlay work was started. It also may be a good thing to use slightly lighter strings after the repair was done.
Edit: While it was apart I'd look at the area the truss rod nut puts pressure and see if a thick metal washer was needed to spread stress.
U.S. Peavey Club Member #137, Official Short Scale Bass Club member number 186
Last edited by mech : 02-09-2013 at 07:04 PM.