I do hope you eventually finish it.
I'm picking up an HB 5 string with a mashed truss rod nut at the weekend, courtesy of the Recycling thread here. I checked with HB and the nut is welded onto the rod and can't be replaced, so the fretboard will have to come off and a replacement put in.
It's a project for the autumn when the nights draw in and I don't have to water the vegetable patch every evening. And I have saved up to buy the required clamps for gluing it back on again. Seriously, a dozen more clamps could cost more than a new bass.đ