Thanks Simon, FW, Doc and Waz. all great ideas.
Yeah Pabs, I was trying to adjust the truss rod myself and then I noticed that there was no end bit for the allen key. Its snapped off and there is just the butt end of the shaft you can see.
I did consider FW taking the fretbard off (its rosewood not ebony) to replace the truss rod and re-placing the fret board. As yeah, I agree, what a cool skill.
But I think costwise, some of the Bass kits are on sale and cost 5/8ths of nothing at the moment, so maybe pilphering the electrics and buying a kit is better.