Spock/Snape fiction?

[syredronning]

illariy is looking for Spock/Snape fiction. I read a good, longer one once where Spock lands in Hogwarts and Snape has to take care of him for a while.

But lo and behold, I neither find it on my computer nor do I remember where it was located. Pointers welcome!

Oh, and there is a Spock/Snape songvid at youtube - not the best vid ever, but inventive :)