I was just wondering if there was any versions of J2/Wincest Buffy the Vampire Slayer out there? Not crossovers -like Dean, Sam and Buffy all meet up and kick some ass- but actually stories where J2 or Sam and Dean -plus other characters from their lives- take the places of the Buffy gang? Like Jared would be Buffy and Jensen would be Angel, etc?

I've seen plenty of crossovers but never anything like this and I'm just curious to know if they even exist. Long fics would be awesome but short fics are always good. NC-17 preferred, but anything will do, lol. :) Beggars can't be choosers.

Thanks in advance! :D