TS/Buffy crossover

[dreaming_k]

I just read a fic where Blair finds out that Rupert Giles (from Buffy the Vampire Slayer) is his father.
Do you know any other The Sentinel/Buffy crossovers? Gen or slash doesn't matter (though, if slash, I prefer J/B). I'd love to read about any interaction between Jim and Blair and the Scoobies. Xander and Spike in particular.