There are two other HERSELF stories that fit your request:
FORSAKE ME NOThttp://www.echonyc.com/~stax/Buffy/herself/forsake.htmlAfter a horrible accident leaves Buffy handicapped, she begins to take out her anger and pain on all those who love her. As she reaches the end of her rope she is given the chance to see how damaging her actions could be to the future.
NOT MY BEAUTIFUL HOUSE http://www.echonyc.com/~stax/Buffy/herself/notmybeautiful.htmlAs Spike goes after that dragon, he finds himself transport instead where he least expected.
Here is Gone by Terri Bottahttp://www.nocturnal-light.net/fanfiction/story/244/Here_is_GoneSummary: Pre- season 7. As a wounded Spike lies dying in the cave, after receiving his soul, he is given the opportunity to go back in time and do a few things different.
The Butterfly Effect by cousinjean http://dark-solace.org/elysian/viewstory.php?sid=421Five months after the events of "Chosen," a still grieving Buffy must follow a time-travelling demon back to 1997 (circa Season 2) Sunnydale to prevent him from destroying the timeline--and try not to destroy it herself in the process.
Pinch Hitter by Dreamweaverhttp://spikeluver.com/SpuffyRealm/viewstory.php?sid=35422Buffy vanishes after stopping Adam and the Powers That Be bring over another Buffy from a parallel dimension to take her place.
The Domino Effect by Anaross http://www.athenewolfe.com/justrewards/viewstory.php?sid=575Post-End of Days. Future Buffy arrives to SunnyD and meets Spike. Their encounter changes the outcome of the battle in the Hellmouth - but not the way Buffy envisions. So she goes back in time again. Unusually plotty and unpredictable fic. Anaross combines the premises of Groundhog Day and Back to the Future to very surprising result.
Legions of True Hearts by Eurydicehttp://dark-solace.org/elysian/viewstory.php?sid=431Post graduation, a restless Buffy goes to London to escape the memories of Angel, only to lose herself in unexpected dreams. But is William real, or is he a distraction? Is he, possibly...both? Buffy/William. - Complete
The Bad Man by dutchbuffy2305 http://spikeluver.com/SpuffyRealm/viewstory.php?sid=9109Crazy souled Spike is rescued from the basement.. sort of....Angst, hurt/comfort and smut ensue... Time travel.
Things Present � Things Past by: Estepheia and Marceehttp://allaboutspike.com/fic.html?id=187Two timelines. Two Slayers. One problem! How does Buffy get back to her present time when she's sucked into the body of a Slayer in 1880? Can another Scooby who tries to rescue her survive the past? Plus, meet William and witness Spike's big decision!