Castiel's Parentage?

[liarashadowsong.livejournal.com]

I've seen fics that involve Castiel being fairly young for an angel, with angels being either created or born (either by parthenogenesis or some variation on sexual reproduction). When Castiel is shown to have one or more angelic parent(s) in fandom, usually he is the offspring of Gabriel, or sometimes Michael (and in one case I've seen, Anna was his mother). Are there any fanfiction stories available in which Castiel is the offspring of Lucifer instead?