There is a former WIP that was recently finished.
The Body by spikes_heartEnd of Season 5, Spike and Buffy relationship wise. Summary:
After falling into a coma, Buffy becomes no more than a body to her friends. Spike refuses to let her fade away.Links via
LJ tagsor you can use the LJ memories, all chapter
here (The last chapter isn't in the memories yet but in the tags.)
One of the stories you've mentioned could be Ashlee's.
Abled by PassionFish is a WIP, a permanent I fear, sadly so. (@ EF)
There is one where Buffy became childlike and Spike became the guardian of Dawn (and her I think). Have to remember the title. Maybe someone remembers?