Hello lovelies!!

I was reading a previous post here, and discovered this fic http://the-miss-lv.livejournal.com/6459.html#cutid1

So now I'm wondering if there are any other fics out there that have the whole knot/tie thing going on.  The mpreg part isn't that big of a deal, though I like it, it's the knotting part I found particularly awesome.  I know there were a couple on the previous post, but most of what was posted was focusing on mpreg, not so much the knotting part, so... any out there?  I don't really care about the pairing, though J2, Jensen/Misha, Dean/Cas are my favorites.  Thanks so much in advance!!!