I'm searching for a fic in which Xander is working night-shift construction in Sunnydale (I think they're rebuilding it) and they find Spike in the ruins of (I think) an old church. Spike's semi-crazy and very ill. Xander finally calls on Wesley for help, which he gives. But Wes has to keep everything from Wolfram and Hart. And that's all I can remember, except that I think it was a longish fic.
Found ... No More Snakes and Ladders, by Reremouse and Tabaqui. Thanks to both my finders. :)